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path: root/drivers/crypto/hifn_795x.c
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Diffstat (limited to 'drivers/crypto/hifn_795x.c')
-rw-r--r--drivers/crypto/hifn_795x.c2838
1 files changed, 2838 insertions, 0 deletions
diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c
new file mode 100644
index 000000000000..16413e57597c
--- /dev/null
+++ b/drivers/crypto/hifn_795x.c
@@ -0,0 +1,2838 @@
+/*
+ * 2007+ Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru>
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/mod_devicetable.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <linux/dma-mapping.h>
+#include <linux/scatterlist.h>
+#include <linux/highmem.h>
+#include <linux/interrupt.h>
+#include <linux/crypto.h>
+#include <linux/hw_random.h>
+#include <linux/ktime.h>
+
+#include <crypto/algapi.h>
+#include <crypto/des.h>
+
+#include <asm/kmap_types.h>
+
+#undef dprintk
+
+#define HIFN_TEST
+//#define HIFN_DEBUG
+
+#ifdef HIFN_DEBUG
+#define dprintk(f, a...) printk(f, ##a)
+#else
+#define dprintk(f, a...) do {} while (0)
+#endif
+
+static char hifn_pll_ref[sizeof("extNNN")] = "ext";
+module_param_string(hifn_pll_ref, hifn_pll_ref, sizeof(hifn_pll_ref), 0444);
+MODULE_PARM_DESC(hifn_pll_ref,
+ "PLL reference clock (pci[freq] or ext[freq], default ext)");
+
+static atomic_t hifn_dev_number;
+
+#define ACRYPTO_OP_DECRYPT 0
+#define ACRYPTO_OP_ENCRYPT 1
+#define ACRYPTO_OP_HMAC 2
+#define ACRYPTO_OP_RNG 3
+
+#define ACRYPTO_MODE_ECB 0
+#define ACRYPTO_MODE_CBC 1
+#define ACRYPTO_MODE_CFB 2
+#define ACRYPTO_MODE_OFB 3
+
+#define ACRYPTO_TYPE_AES_128 0
+#define ACRYPTO_TYPE_AES_192 1
+#define ACRYPTO_TYPE_AES_256 2
+#define ACRYPTO_TYPE_3DES 3
+#define ACRYPTO_TYPE_DES 4
+
+#define PCI_VENDOR_ID_HIFN 0x13A3
+#define PCI_DEVICE_ID_HIFN_7955 0x0020
+#define PCI_DEVICE_ID_HIFN_7956 0x001d
+
+/* I/O region sizes */
+
+#define HIFN_BAR0_SIZE 0x1000
+#define HIFN_BAR1_SIZE 0x2000
+#define HIFN_BAR2_SIZE 0x8000
+
+/* DMA registres */
+
+#define HIFN_DMA_CRA 0x0C /* DMA Command Ring Address */
+#define HIFN_DMA_SDRA 0x1C /* DMA Source Data Ring Address */
+#define HIFN_DMA_RRA 0x2C /* DMA Result Ring Address */
+#define HIFN_DMA_DDRA 0x3C /* DMA Destination Data Ring Address */
+#define HIFN_DMA_STCTL 0x40 /* DMA Status and Control */
+#define HIFN_DMA_INTREN 0x44 /* DMA Interrupt Enable */
+#define HIFN_DMA_CFG1 0x48 /* DMA Configuration #1 */
+#define HIFN_DMA_CFG2 0x6C /* DMA Configuration #2 */
+#define HIFN_CHIP_ID 0x98 /* Chip ID */
+
+/*
+ * Processing Unit Registers (offset from BASEREG0)
+ */
+#define HIFN_0_PUDATA 0x00 /* Processing Unit Data */
+#define HIFN_0_PUCTRL 0x04 /* Processing Unit Control */
+#define HIFN_0_PUISR 0x08 /* Processing Unit Interrupt Status */
+#define HIFN_0_PUCNFG 0x0c /* Processing Unit Configuration */
+#define HIFN_0_PUIER 0x10 /* Processing Unit Interrupt Enable */
+#define HIFN_0_PUSTAT 0x14 /* Processing Unit Status/Chip ID */
+#define HIFN_0_FIFOSTAT 0x18 /* FIFO Status */
+#define HIFN_0_FIFOCNFG 0x1c /* FIFO Configuration */
+#define HIFN_0_SPACESIZE 0x20 /* Register space size */
+
+/* Processing Unit Control Register (HIFN_0_PUCTRL) */
+#define HIFN_PUCTRL_CLRSRCFIFO 0x0010 /* clear source fifo */
+#define HIFN_PUCTRL_STOP 0x0008 /* stop pu */
+#define HIFN_PUCTRL_LOCKRAM 0x0004 /* lock ram */
+#define HIFN_PUCTRL_DMAENA 0x0002 /* enable dma */
+#define HIFN_PUCTRL_RESET 0x0001 /* Reset processing unit */
+
+/* Processing Unit Interrupt Status Register (HIFN_0_PUISR) */
+#define HIFN_PUISR_CMDINVAL 0x8000 /* Invalid command interrupt */
+#define HIFN_PUISR_DATAERR 0x4000 /* Data error interrupt */
+#define HIFN_PUISR_SRCFIFO 0x2000 /* Source FIFO ready interrupt */
+#define HIFN_PUISR_DSTFIFO 0x1000 /* Destination FIFO ready interrupt */
+#define HIFN_PUISR_DSTOVER 0x0200 /* Destination overrun interrupt */
+#define HIFN_PUISR_SRCCMD 0x0080 /* Source command interrupt */
+#define HIFN_PUISR_SRCCTX 0x0040 /* Source context interrupt */
+#define HIFN_PUISR_SRCDATA 0x0020 /* Source data interrupt */
+#define HIFN_PUISR_DSTDATA 0x0010 /* Destination data interrupt */
+#define HIFN_PUISR_DSTRESULT 0x0004 /* Destination result interrupt */
+
+/* Processing Unit Configuration Register (HIFN_0_PUCNFG) */
+#define HIFN_PUCNFG_DRAMMASK 0xe000 /* DRAM size mask */
+#define HIFN_PUCNFG_DSZ_256K 0x0000 /* 256k dram */
+#define HIFN_PUCNFG_DSZ_512K 0x2000 /* 512k dram */
+#define HIFN_PUCNFG_DSZ_1M 0x4000 /* 1m dram */
+#define HIFN_PUCNFG_DSZ_2M 0x6000 /* 2m dram */
+#define HIFN_PUCNFG_DSZ_4M 0x8000 /* 4m dram */
+#define HIFN_PUCNFG_DSZ_8M 0xa000 /* 8m dram */
+#define HIFN_PUNCFG_DSZ_16M 0xc000 /* 16m dram */
+#define HIFN_PUCNFG_DSZ_32M 0xe000 /* 32m dram */
+#define HIFN_PUCNFG_DRAMREFRESH 0x1800 /* DRAM refresh rate mask */
+#define HIFN_PUCNFG_DRFR_512 0x0000 /* 512 divisor of ECLK */
+#define HIFN_PUCNFG_DRFR_256 0x0800 /* 256 divisor of ECLK */
+#define HIFN_PUCNFG_DRFR_128 0x1000 /* 128 divisor of ECLK */
+#define HIFN_PUCNFG_TCALLPHASES 0x0200 /* your guess is as good as mine... */
+#define HIFN_PUCNFG_TCDRVTOTEM 0x0100 /* your guess is as good as mine... */
+#define HIFN_PUCNFG_BIGENDIAN 0x0080 /* DMA big endian mode */
+#define HIFN_PUCNFG_BUS32 0x0040 /* Bus width 32bits */
+#define HIFN_PUCNFG_BUS16 0x0000 /* Bus width 16 bits */
+#define HIFN_PUCNFG_CHIPID 0x0020 /* Allow chipid from PUSTAT */
+#define HIFN_PUCNFG_DRAM 0x0010 /* Context RAM is DRAM */
+#define HIFN_PUCNFG_SRAM 0x0000 /* Context RAM is SRAM */
+#define HIFN_PUCNFG_COMPSING 0x0004 /* Enable single compression context */
+#define HIFN_PUCNFG_ENCCNFG 0x0002 /* Encryption configuration */
+
+/* Processing Unit Interrupt Enable Register (HIFN_0_PUIER) */
+#define HIFN_PUIER_CMDINVAL 0x8000 /* Invalid command interrupt */
+#define HIFN_PUIER_DATAERR 0x4000 /* Data error interrupt */
+#define HIFN_PUIER_SRCFIFO 0x2000 /* Source FIFO ready interrupt */
+#define HIFN_PUIER_DSTFIFO 0x1000 /* Destination FIFO ready interrupt */
+#define HIFN_PUIER_DSTOVER 0x0200 /* Destination overrun interrupt */
+#define HIFN_PUIER_SRCCMD 0x0080 /* Source command interrupt */
+#define HIFN_PUIER_SRCCTX 0x0040 /* Source context interrupt */
+#define HIFN_PUIER_SRCDATA 0x0020 /* Source data interrupt */
+#define HIFN_PUIER_DSTDATA 0x0010 /* Destination data interrupt */
+#define HIFN_PUIER_DSTRESULT 0x0004 /* Destination result interrupt */
+
+/* Processing Unit Status Register/Chip ID (HIFN_0_PUSTAT) */
+#define HIFN_PUSTAT_CMDINVAL 0x8000 /* Invalid command interrupt */
+#define HIFN_PUSTAT_DATAERR 0x4000 /* Data error interrupt */
+#define HIFN_PUSTAT_SRCFIFO 0x2000 /* Source FIFO ready interrupt */
+#define HIFN_PUSTAT_DSTFIFO 0x1000 /* Destination FIFO ready interrupt */
+#define HIFN_PUSTAT_DSTOVER 0x0200 /* Destination overrun interrupt */
+#define HIFN_PUSTAT_SRCCMD 0x0080 /* Source command interrupt */
+#define HIFN_PUSTAT_SRCCTX 0x0040 /* Source context interrupt */
+#define HIFN_PUSTAT_SRCDATA 0x0020 /* Source data interrupt */
+#define HIFN_PUSTAT_DSTDATA 0x0010 /* Destination data interrupt */
+#define HIFN_PUSTAT_DSTRESULT 0x0004 /* Destination result interrupt */
+#define HIFN_PUSTAT_CHIPREV 0x00ff /* Chip revision mask */
+#define HIFN_PUSTAT_CHIPENA 0xff00 /* Chip enabled mask */
+#define HIFN_PUSTAT_ENA_2 0x1100 /* Level 2 enabled */
+#define HIFN_PUSTAT_ENA_1 0x1000 /* Level 1 enabled */
+#define HIFN_PUSTAT_ENA_0 0x3000 /* Level 0 enabled */
+#define HIFN_PUSTAT_REV_2 0x0020 /* 7751 PT6/2 */
+#define HIFN_PUSTAT_REV_3 0x0030 /* 7751 PT6/3 */
+
+/* FIFO Status Register (HIFN_0_FIFOSTAT) */
+#define HIFN_FIFOSTAT_SRC 0x7f00 /* Source FIFO available */
+#define HIFN_FIFOSTAT_DST 0x007f /* Destination FIFO available */
+
+/* FIFO Configuration Register (HIFN_0_FIFOCNFG) */
+#define HIFN_FIFOCNFG_THRESHOLD 0x0400 /* must be written as 1 */
+
+/*
+ * DMA Interface Registers (offset from BASEREG1)
+ */
+#define HIFN_1_DMA_CRAR 0x0c /* DMA Command Ring Address */
+#define HIFN_1_DMA_SRAR 0x1c /* DMA Source Ring Address */
+#define HIFN_1_DMA_RRAR 0x2c /* DMA Result Ring Address */
+#define HIFN_1_DMA_DRAR 0x3c /* DMA Destination Ring Address */
+#define HIFN_1_DMA_CSR 0x40 /* DMA Status and Control */
+#define HIFN_1_DMA_IER 0x44 /* DMA Interrupt Enable */
+#define HIFN_1_DMA_CNFG 0x48 /* DMA Configuration */
+#define HIFN_1_PLL 0x4c /* 795x: PLL config */
+#define HIFN_1_7811_RNGENA 0x60 /* 7811: rng enable */
+#define HIFN_1_7811_RNGCFG 0x64 /* 7811: rng config */
+#define HIFN_1_7811_RNGDAT 0x68 /* 7811: rng data */
+#define HIFN_1_7811_RNGSTS 0x6c /* 7811: rng status */
+#define HIFN_1_7811_MIPSRST 0x94 /* 7811: MIPS reset */
+#define HIFN_1_REVID 0x98 /* Revision ID */
+#define HIFN_1_UNLOCK_SECRET1 0xf4
+#define HIFN_1_UNLOCK_SECRET2 0xfc
+#define HIFN_1_PUB_RESET 0x204 /* Public/RNG Reset */
+#define HIFN_1_PUB_BASE 0x300 /* Public Base Address */
+#define HIFN_1_PUB_OPLEN 0x304 /* Public Operand Length */
+#define HIFN_1_PUB_OP 0x308 /* Public Operand */
+#define HIFN_1_PUB_STATUS 0x30c /* Public Status */
+#define HIFN_1_PUB_IEN 0x310 /* Public Interrupt enable */
+#define HIFN_1_RNG_CONFIG 0x314 /* RNG config */
+#define HIFN_1_RNG_DATA 0x318 /* RNG data */
+#define HIFN_1_PUB_MEM 0x400 /* start of Public key memory */
+#define HIFN_1_PUB_MEMEND 0xbff /* end of Public key memory */
+
+/* DMA Status and Control Register (HIFN_1_DMA_CSR) */
+#define HIFN_DMACSR_D_CTRLMASK 0xc0000000 /* Destinition Ring Control */
+#define HIFN_DMACSR_D_CTRL_NOP 0x00000000 /* Dest. Control: no-op */
+#define HIFN_DMACSR_D_CTRL_DIS 0x40000000 /* Dest. Control: disable */
+#define HIFN_DMACSR_D_CTRL_ENA 0x80000000 /* Dest. Control: enable */
+#define HIFN_DMACSR_D_ABORT 0x20000000 /* Destinition Ring PCIAbort */
+#define HIFN_DMACSR_D_DONE 0x10000000 /* Destinition Ring Done */
+#define HIFN_DMACSR_D_LAST 0x08000000 /* Destinition Ring Last */
+#define HIFN_DMACSR_D_WAIT 0x04000000 /* Destinition Ring Waiting */
+#define HIFN_DMACSR_D_OVER 0x02000000 /* Destinition Ring Overflow */
+#define HIFN_DMACSR_R_CTRL 0x00c00000 /* Result Ring Control */
+#define HIFN_DMACSR_R_CTRL_NOP 0x00000000 /* Result Control: no-op */
+#define HIFN_DMACSR_R_CTRL_DIS 0x00400000 /* Result Control: disable */
+#define HIFN_DMACSR_R_CTRL_ENA 0x00800000 /* Result Control: enable */
+#define HIFN_DMACSR_R_ABORT 0x00200000 /* Result Ring PCI Abort */
+#define HIFN_DMACSR_R_DONE 0x00100000 /* Result Ring Done */
+#define HIFN_DMACSR_R_LAST 0x00080000 /* Result Ring Last */
+#define HIFN_DMACSR_R_WAIT 0x00040000 /* Result Ring Waiting */
+#define HIFN_DMACSR_R_OVER 0x00020000 /* Result Ring Overflow */
+#define HIFN_DMACSR_S_CTRL 0x0000c000 /* Source Ring Control */
+#define HIFN_DMACSR_S_CTRL_NOP 0x00000000 /* Source Control: no-op */
+#define HIFN_DMACSR_S_CTRL_DIS 0x00004000 /* Source Control: disable */
+#define HIFN_DMACSR_S_CTRL_ENA 0x00008000 /* Source Control: enable */
+#define HIFN_DMACSR_S_ABORT 0x00002000 /* Source Ring PCI Abort */
+#define HIFN_DMACSR_S_DONE 0x00001000 /* Source Ring Done */
+#define HIFN_DMACSR_S_LAST 0x00000800 /* Source Ring Last */
+#define HIFN_DMACSR_S_WAIT 0x00000400 /* Source Ring Waiting */
+#define HIFN_DMACSR_ILLW 0x00000200 /* Illegal write (7811 only) */
+#define HIFN_DMACSR_ILLR 0x00000100 /* Illegal read (7811 only) */
+#define HIFN_DMACSR_C_CTRL 0x000000c0 /* Command Ring Control */
+#define HIFN_DMACSR_C_CTRL_NOP 0x00000000 /* Command Control: no-op */
+#define HIFN_DMACSR_C_CTRL_DIS 0x00000040 /* Command Control: disable */
+#define HIFN_DMACSR_C_CTRL_ENA 0x00000080 /* Command Control: enable */
+#define HIFN_DMACSR_C_ABORT 0x00000020 /* Command Ring PCI Abort */
+#define HIFN_DMACSR_C_DONE 0x00000010 /* Command Ring Done */
+#define HIFN_DMACSR_C_LAST 0x00000008 /* Command Ring Last */
+#define HIFN_DMACSR_C_WAIT 0x00000004 /* Command Ring Waiting */
+#define HIFN_DMACSR_PUBDONE 0x00000002 /* Public op done (7951 only) */
+#define HIFN_DMACSR_ENGINE 0x00000001 /* Command Ring Engine IRQ */
+
+/* DMA Interrupt Enable Register (HIFN_1_DMA_IER) */
+#define HIFN_DMAIER_D_ABORT 0x20000000 /* Destination Ring PCIAbort */
+#define HIFN_DMAIER_D_DONE 0x10000000 /* Destination Ring Done */
+#define HIFN_DMAIER_D_LAST 0x08000000 /* Destination Ring Last */
+#define HIFN_DMAIER_D_WAIT 0x04000000 /* Destination Ring Waiting */
+#define HIFN_DMAIER_D_OVER 0x02000000 /* Destination Ring Overflow */
+#define HIFN_DMAIER_R_ABORT 0x00200000 /* Result Ring PCI Abort */
+#define HIFN_DMAIER_R_DONE 0x00100000 /* Result Ring Done */
+#define HIFN_DMAIER_R_LAST 0x00080000 /* Result Ring Last */
+#define HIFN_DMAIER_R_WAIT 0x00040000 /* Result Ring Waiting */
+#define HIFN_DMAIER_R_OVER 0x00020000 /* Result Ring Overflow */
+#define HIFN_DMAIER_S_ABORT 0x00002000 /* Source Ring PCI Abort */
+#define HIFN_DMAIER_S_DONE 0x00001000 /* Source Ring Done */
+#define HIFN_DMAIER_S_LAST 0x00000800 /* Source Ring Last */
+#define HIFN_DMAIER_S_WAIT 0x00000400 /* Source Ring Waiting */
+#define HIFN_DMAIER_ILLW 0x00000200 /* Illegal write (7811 only) */
+#define HIFN_DMAIER_ILLR 0x00000100 /* Illegal read (7811 only) */
+#define HIFN_DMAIER_C_ABORT 0x00000020 /* Command Ring PCI Abort */
+#define HIFN_DMAIER_C_DONE 0x00000010 /* Command Ring Done */
+#define HIFN_DMAIER_C_LAST 0x00000008 /* Command Ring Last */
+#define HIFN_DMAIER_C_WAIT 0x00000004 /* Command Ring Waiting */
+#define HIFN_DMAIER_PUBDONE 0x00000002 /* public op done (7951 only) */
+#define HIFN_DMAIER_ENGINE 0x00000001 /* Engine IRQ */
+
+/* DMA Configuration Register (HIFN_1_DMA_CNFG) */
+#define HIFN_DMACNFG_BIGENDIAN 0x10000000 /* big endian mode */
+#define HIFN_DMACNFG_POLLFREQ 0x00ff0000 /* Poll frequency mask */
+#define HIFN_DMACNFG_UNLOCK 0x00000800
+#define HIFN_DMACNFG_POLLINVAL 0x00000700 /* Invalid Poll Scalar */
+#define HIFN_DMACNFG_LAST 0x00000010 /* Host control LAST bit */
+#define HIFN_DMACNFG_MODE 0x00000004 /* DMA mode */
+#define HIFN_DMACNFG_DMARESET 0x00000002 /* DMA Reset # */
+#define HIFN_DMACNFG_MSTRESET 0x00000001 /* Master Reset # */
+
+/* PLL configuration register */
+#define HIFN_PLL_REF_CLK_HBI 0x00000000 /* HBI reference clock */
+#define HIFN_PLL_REF_CLK_PLL 0x00000001 /* PLL reference clock */
+#define HIFN_PLL_BP 0x00000002 /* Reference clock bypass */
+#define HIFN_PLL_PK_CLK_HBI 0x00000000 /* PK engine HBI clock */
+#define HIFN_PLL_PK_CLK_PLL 0x00000008 /* PK engine PLL clock */
+#define HIFN_PLL_PE_CLK_HBI 0x00000000 /* PE engine HBI clock */
+#define HIFN_PLL_PE_CLK_PLL 0x00000010 /* PE engine PLL clock */
+#define HIFN_PLL_RESERVED_1 0x00000400 /* Reserved bit, must be 1 */
+#define HIFN_PLL_ND_SHIFT 11 /* Clock multiplier shift */
+#define HIFN_PLL_ND_MULT_2 0x00000000 /* PLL clock multiplier 2 */
+#define HIFN_PLL_ND_MULT_4 0x00000800 /* PLL clock multiplier 4 */
+#define HIFN_PLL_ND_MULT_6 0x00001000 /* PLL clock multiplier 6 */
+#define HIFN_PLL_ND_MULT_8 0x00001800 /* PLL clock multiplier 8 */
+#define HIFN_PLL_ND_MULT_10 0x00002000 /* PLL clock multiplier 10 */
+#define HIFN_PLL_ND_MULT_12 0x00002800 /* PLL clock multiplier 12 */
+#define HIFN_PLL_IS_1_8 0x00000000 /* charge pump (mult. 1-8) */
+#define HIFN_PLL_IS_9_12 0x00010000 /* charge pump (mult. 9-12) */
+
+#define HIFN_PLL_FCK_MAX 266 /* Maximum PLL frequency */
+
+/* Public key reset register (HIFN_1_PUB_RESET) */
+#define HIFN_PUBRST_RESET 0x00000001 /* reset public/rng unit */
+
+/* Public base address register (HIFN_1_PUB_BASE) */
+#define HIFN_PUBBASE_ADDR 0x00003fff /* base address */
+
+/* Public operand length register (HIFN_1_PUB_OPLEN) */
+#define HIFN_PUBOPLEN_MOD_M 0x0000007f /* modulus length mask */
+#define HIFN_PUBOPLEN_MOD_S 0 /* modulus length shift */
+#define HIFN_PUBOPLEN_EXP_M 0x0003ff80 /* exponent length mask */
+#define HIFN_PUBOPLEN_EXP_S 7 /* exponent lenght shift */
+#define HIFN_PUBOPLEN_RED_M 0x003c0000 /* reducend length mask */
+#define HIFN_PUBOPLEN_RED_S 18 /* reducend length shift */
+
+/* Public operation register (HIFN_1_PUB_OP) */
+#define HIFN_PUBOP_AOFFSET_M 0x0000007f /* A offset mask */
+#define HIFN_PUBOP_AOFFSET_S 0 /* A offset shift */
+#define HIFN_PUBOP_BOFFSET_M 0x00000f80 /* B offset mask */
+#define HIFN_PUBOP_BOFFSET_S 7 /* B offset shift */
+#define HIFN_PUBOP_MOFFSET_M 0x0003f000 /* M offset mask */
+#define HIFN_PUBOP_MOFFSET_S 12 /* M offset shift */
+#define HIFN_PUBOP_OP_MASK 0x003c0000 /* Opcode: */
+#define HIFN_PUBOP_OP_NOP 0x00000000 /* NOP */
+#define HIFN_PUBOP_OP_ADD 0x00040000 /* ADD */
+#define HIFN_PUBOP_OP_ADDC 0x00080000 /* ADD w/carry */
+#define HIFN_PUBOP_OP_SUB 0x000c0000 /* SUB */
+#define HIFN_PUBOP_OP_SUBC 0x00100000 /* SUB w/carry */
+#define HIFN_PUBOP_OP_MODADD 0x00140000 /* Modular ADD */
+#define HIFN_PUBOP_OP_MODSUB 0x00180000 /* Modular SUB */
+#define HIFN_PUBOP_OP_INCA 0x001c0000 /* INC A */
+#define HIFN_PUBOP_OP_DECA 0x00200000 /* DEC A */
+#define HIFN_PUBOP_OP_MULT 0x00240000 /* MULT */
+#define HIFN_PUBOP_OP_MODMULT 0x00280000 /* Modular MULT */
+#define HIFN_PUBOP_OP_MODRED 0x002c0000 /* Modular RED */
+#define HIFN_PUBOP_OP_MODEXP 0x00300000 /* Modular EXP */
+
+/* Public status register (HIFN_1_PUB_STATUS) */
+#define HIFN_PUBSTS_DONE 0x00000001 /* operation done */
+#define HIFN_PUBSTS_CARRY 0x00000002 /* carry */
+
+/* Public interrupt enable register (HIFN_1_PUB_IEN) */
+#define HIFN_PUBIEN_DONE 0x00000001 /* operation done interrupt */
+
+/* Random number generator config register (HIFN_1_RNG_CONFIG) */
+#define HIFN_RNGCFG_ENA 0x00000001 /* enable rng */
+
+#define HIFN_NAMESIZE 32
+#define HIFN_MAX_RESULT_ORDER 5
+
+#define HIFN_D_CMD_RSIZE 24*4
+#define HIFN_D_SRC_RSIZE 80*4
+#define HIFN_D_DST_RSIZE 80*4
+#define HIFN_D_RES_RSIZE 24*4
+
+#define HIFN_QUEUE_LENGTH HIFN_D_CMD_RSIZE-5
+
+#define AES_MIN_KEY_SIZE 16
+#define AES_MAX_KEY_SIZE 32
+
+#define HIFN_DES_KEY_LENGTH 8
+#define HIFN_3DES_KEY_LENGTH 24
+#define HIFN_MAX_CRYPT_KEY_LENGTH AES_MAX_KEY_SIZE
+#define HIFN_IV_LENGTH 8
+#define HIFN_AES_IV_LENGTH 16
+#define HIFN_MAX_IV_LENGTH HIFN_AES_IV_LENGTH
+
+#define HIFN_MAC_KEY_LENGTH 64
+#define HIFN_MD5_LENGTH 16
+#define HIFN_SHA1_LENGTH 20
+#define HIFN_MAC_TRUNC_LENGTH 12
+
+#define HIFN_MAX_COMMAND (8 + 8 + 8 + 64 + 260)
+#define HIFN_MAX_RESULT (8 + 4 + 4 + 20 + 4)
+#define HIFN_USED_RESULT 12
+
+struct hifn_desc
+{
+ volatile u32 l;
+ volatile u32 p;
+};
+
+struct hifn_dma {
+ struct hifn_desc cmdr[HIFN_D_CMD_RSIZE+1];
+ struct hifn_desc srcr[HIFN_D_SRC_RSIZE+1];
+ struct hifn_desc dstr[HIFN_D_DST_RSIZE+1];
+ struct hifn_desc resr[HIFN_D_RES_RSIZE+1];
+
+ u8 command_bufs[HIFN_D_CMD_RSIZE][HIFN_MAX_COMMAND];
+ u8 result_bufs[HIFN_D_CMD_RSIZE][HIFN_MAX_RESULT];
+
+ u64 test_src, test_dst;
+
+ /*
+ * Our current positions for insertion and removal from the descriptor
+ * rings.
+ */
+ volatile int cmdi, srci, dsti, resi;
+ volatile int cmdu, srcu, dstu, resu;
+ int cmdk, srck, dstk, resk;
+};
+
+#define HIFN_FLAG_CMD_BUSY (1<<0)
+#define HIFN_FLAG_SRC_BUSY (1<<1)
+#define HIFN_FLAG_DST_BUSY (1<<2)
+#define HIFN_FLAG_RES_BUSY (1<<3)
+#define HIFN_FLAG_OLD_KEY (1<<4)
+
+#define HIFN_DEFAULT_ACTIVE_NUM 5
+
+struct hifn_device
+{
+ char name[HIFN_NAMESIZE];
+
+ int irq;
+
+ struct pci_dev *pdev;
+ void __iomem *bar[3];
+
+ unsigned long result_mem;
+ dma_addr_t dst;
+
+ void *desc_virt;
+ dma_addr_t desc_dma;
+
+ u32 dmareg;
+
+ void *sa[HIFN_D_RES_RSIZE];
+
+ spinlock_t lock;
+
+ void *priv;
+
+ u32 flags;
+ int active, started;
+ struct delayed_work work;
+ unsigned long reset;
+ unsigned long success;
+ unsigned long prev_success;
+
+ u8 snum;
+
+ struct tasklet_struct tasklet;
+
+ struct crypto_queue queue;
+ struct list_head alg_list;
+
+ unsigned int pk_clk_freq;
+
+#if defined(CONFIG_HW_RANDOM) || defined(CONFIG_HW_RANDOM_MODULE)
+ unsigned int rng_wait_time;
+ ktime_t rngtime;
+ struct hwrng rng;
+#endif
+};
+
+#define HIFN_D_LENGTH 0x0000ffff
+#define HIFN_D_NOINVALID 0x01000000
+#define HIFN_D_MASKDONEIRQ 0x02000000
+#define HIFN_D_DESTOVER 0x04000000
+#define HIFN_D_OVER 0x08000000
+#define HIFN_D_LAST 0x20000000
+#define HIFN_D_JUMP 0x40000000
+#define HIFN_D_VALID 0x80000000
+
+struct hifn_base_command
+{
+ volatile u16 masks;
+ volatile u16 session_num;
+ volatile u16 total_source_count;
+ volatile u16 total_dest_count;
+};
+
+#define HIFN_BASE_CMD_COMP 0x0100 /* enable compression engine */
+#define HIFN_BASE_CMD_PAD 0x0200 /* enable padding engine */
+#define HIFN_BASE_CMD_MAC 0x0400 /* enable MAC engine */
+#define HIFN_BASE_CMD_CRYPT 0x0800 /* enable crypt engine */
+#define HIFN_BASE_CMD_DECODE 0x2000
+#define HIFN_BASE_CMD_SRCLEN_M 0xc000
+#define HIFN_BASE_CMD_SRCLEN_S 14
+#define HIFN_BASE_CMD_DSTLEN_M 0x3000
+#define HIFN_BASE_CMD_DSTLEN_S 12
+#define HIFN_BASE_CMD_LENMASK_HI 0x30000
+#define HIFN_BASE_CMD_LENMASK_LO 0x0ffff
+
+/*
+ * Structure to help build up the command data structure.
+ */
+struct hifn_crypt_command
+{
+ volatile u16 masks;
+ volatile u16 header_skip;
+ volatile u16 source_count;
+ volatile u16 reserved;
+};
+
+#define HIFN_CRYPT_CMD_ALG_MASK 0x0003 /* algorithm: */
+#define HIFN_CRYPT_CMD_ALG_DES 0x0000 /* DES */
+#define HIFN_CRYPT_CMD_ALG_3DES 0x0001 /* 3DES */
+#define HIFN_CRYPT_CMD_ALG_RC4 0x0002 /* RC4 */
+#define HIFN_CRYPT_CMD_ALG_AES 0x0003 /* AES */
+#define HIFN_CRYPT_CMD_MODE_MASK 0x0018 /* Encrypt mode: */
+#define HIFN_CRYPT_CMD_MODE_ECB 0x0000 /* ECB */
+#define HIFN_CRYPT_CMD_MODE_CBC 0x0008 /* CBC */
+#define HIFN_CRYPT_CMD_MODE_CFB 0x0010 /* CFB */
+#define HIFN_CRYPT_CMD_MODE_OFB 0x0018 /* OFB */
+#define HIFN_CRYPT_CMD_CLR_CTX 0x0040 /* clear context */
+#define HIFN_CRYPT_CMD_KSZ_MASK 0x0600 /* AES key size: */
+#define HIFN_CRYPT_CMD_KSZ_128 0x0000 /* 128 bit */
+#define HIFN_CRYPT_CMD_KSZ_192 0x0200 /* 192 bit */
+#define HIFN_CRYPT_CMD_KSZ_256 0x0400 /* 256 bit */
+#define HIFN_CRYPT_CMD_NEW_KEY 0x0800 /* expect new key */
+#define HIFN_CRYPT_CMD_NEW_IV 0x1000 /* expect new iv */
+#define HIFN_CRYPT_CMD_SRCLEN_M 0xc000
+#define HIFN_CRYPT_CMD_SRCLEN_S 14
+
+/*
+ * Structure to help build up the command data structure.
+ */
+struct hifn_mac_command
+{
+ volatile u16 masks;
+ volatile u16 header_skip;
+ volatile u16 source_count;
+ volatile u16 reserved;
+};
+
+#define HIFN_MAC_CMD_ALG_MASK 0x0001
+#define HIFN_MAC_CMD_ALG_SHA1 0x0000
+#define HIFN_MAC_CMD_ALG_MD5 0x0001
+#define HIFN_MAC_CMD_MODE_MASK 0x000c
+#define HIFN_MAC_CMD_MODE_HMAC 0x0000
+#define HIFN_MAC_CMD_MODE_SSL_MAC 0x0004
+#define HIFN_MAC_CMD_MODE_HASH 0x0008
+#define HIFN_MAC_CMD_MODE_FULL 0x0004
+#define HIFN_MAC_CMD_TRUNC 0x0010
+#define HIFN_MAC_CMD_RESULT 0x0020
+#define HIFN_MAC_CMD_APPEND 0x0040
+#define HIFN_MAC_CMD_SRCLEN_M 0xc000
+#define HIFN_MAC_CMD_SRCLEN_S 14
+
+/*
+ * MAC POS IPsec initiates authentication after encryption on encodes
+ * and before decryption on decodes.
+ */
+#define HIFN_MAC_CMD_POS_IPSEC 0x0200
+#define HIFN_MAC_CMD_NEW_KEY 0x0800
+
+struct hifn_comp_command
+{
+ volatile u16 masks;
+ volatile u16 header_skip;
+ volatile u16 source_count;
+ volatile u16 reserved;
+};
+
+#define HIFN_COMP_CMD_SRCLEN_M 0xc000
+#define HIFN_COMP_CMD_SRCLEN_S 14
+#define HIFN_COMP_CMD_ONE 0x0100 /* must be one */
+#define HIFN_COMP_CMD_CLEARHIST 0x0010 /* clear history */
+#define HIFN_COMP_CMD_UPDATEHIST 0x0008 /* update history */
+#define HIFN_COMP_CMD_LZS_STRIP0 0x0004 /* LZS: strip zero */
+#define HIFN_COMP_CMD_MPPC_RESTART 0x0004 /* MPPC: restart */
+#define HIFN_COMP_CMD_ALG_MASK 0x0001 /* compression mode: */
+#define HIFN_COMP_CMD_ALG_MPPC 0x0001 /* MPPC */
+#define HIFN_COMP_CMD_ALG_LZS 0x0000 /* LZS */
+
+struct hifn_base_result
+{
+ volatile u16 flags;
+ volatile u16 session;
+ volatile u16 src_cnt; /* 15:0 of source count */
+ volatile u16 dst_cnt; /* 15:0 of dest count */
+};
+
+#define HIFN_BASE_RES_DSTOVERRUN 0x0200 /* destination overrun */
+#define HIFN_BASE_RES_SRCLEN_M 0xc000 /* 17:16 of source count */
+#define HIFN_BASE_RES_SRCLEN_S 14
+#define HIFN_BASE_RES_DSTLEN_M 0x3000 /* 17:16 of dest count */
+#define HIFN_BASE_RES_DSTLEN_S 12
+
+struct hifn_comp_result
+{
+ volatile u16 flags;
+ volatile u16 crc;
+};
+
+#define HIFN_COMP_RES_LCB_M 0xff00 /* longitudinal check byte */
+#define HIFN_COMP_RES_LCB_S 8
+#define HIFN_COMP_RES_RESTART 0x0004 /* MPPC: restart */
+#define HIFN_COMP_RES_ENDMARKER 0x0002 /* LZS: end marker seen */
+#define HIFN_COMP_RES_SRC_NOTZERO 0x0001 /* source expired */
+
+struct hifn_mac_result
+{
+ volatile u16 flags;
+ volatile u16 reserved;
+ /* followed by 0, 6, 8, or 10 u16's of the MAC, then crypt */
+};
+
+#define HIFN_MAC_RES_MISCOMPARE 0x0002 /* compare failed */
+#define HIFN_MAC_RES_SRC_NOTZERO 0x0001 /* source expired */
+
+struct hifn_crypt_result
+{
+ volatile u16 flags;
+ volatile u16 reserved;
+};
+
+#define HIFN_CRYPT_RES_SRC_NOTZERO 0x0001 /* source expired */
+
+#ifndef HIFN_POLL_FREQUENCY
+#define HIFN_POLL_FREQUENCY 0x1
+#endif
+
+#ifndef HIFN_POLL_SCALAR
+#define HIFN_POLL_SCALAR 0x0
+#endif
+
+#define HIFN_MAX_SEGLEN 0xffff /* maximum dma segment len */
+#define HIFN_MAX_DMALEN 0x3ffff /* maximum dma length */
+
+struct hifn_crypto_alg
+{
+ struct list_head entry;
+ struct crypto_alg alg;
+ struct hifn_device *dev;
+};
+
+#define ASYNC_SCATTERLIST_CACHE 16
+
+#define ASYNC_FLAGS_MISALIGNED (1<<0)
+
+struct ablkcipher_walk
+{
+ struct scatterlist cache[ASYNC_SCATTERLIST_CACHE];
+ u32 flags;
+ int num;
+};
+
+struct hifn_context
+{
+ u8 key[HIFN_MAX_CRYPT_KEY_LENGTH], *iv;
+ struct hifn_device *dev;
+ unsigned int keysize, ivsize;
+ u8 op, type, mode, unused;
+ struct ablkcipher_walk walk;
+ atomic_t sg_num;
+};
+
+#define crypto_alg_to_hifn(a) container_of(a, struct hifn_crypto_alg, alg)
+
+static inline u32 hifn_read_0(struct hifn_device *dev, u32 reg)
+{
+ u32 ret;
+
+ ret = readl((char *)(dev->bar[0]) + reg);
+
+ return ret;
+}
+
+static inline u32 hifn_read_1(struct hifn_device *dev, u32 reg)
+{
+ u32 ret;
+
+ ret = readl((char *)(dev->bar[1]) + reg);
+
+ return ret;
+}
+
+static inline void hifn_write_0(struct hifn_device *dev, u32 reg, u32 val)
+{
+ writel(val, (char *)(dev->bar[0]) + reg);
+}
+
+static inline void hifn_write_1(struct hifn_device *dev, u32 reg, u32 val)
+{
+ writel(val, (char *)(dev->bar[1]) + reg);
+}
+
+static void hifn_wait_puc(struct hifn_device *dev)
+{
+ int i;
+ u32 ret;
+
+ for (i=10000; i > 0; --i) {
+ ret = hifn_read_0(dev, HIFN_0_PUCTRL);
+ if (!(ret & HIFN_PUCTRL_RESET))
+ break;
+
+ udelay(1);
+ }
+
+ if (!i)
+ dprintk("%s: Failed to reset PUC unit.\n", dev->name);
+}
+
+static void hifn_reset_puc(struct hifn_device *dev)
+{
+ hifn_write_0(dev, HIFN_0_PUCTRL, HIFN_PUCTRL_DMAENA);
+ hifn_wait_puc(dev);
+}
+
+static void hifn_stop_device(struct hifn_device *dev)
+{
+ hifn_write_1(dev, HIFN_1_DMA_CSR,
+ HIFN_DMACSR_D_CTRL_DIS | HIFN_DMACSR_R_CTRL_DIS |
+ HIFN_DMACSR_S_CTRL_DIS | HIFN_DMACSR_C_CTRL_DIS);
+ hifn_write_0(dev, HIFN_0_PUIER, 0);
+ hifn_write_1(dev, HIFN_1_DMA_IER, 0);
+}
+
+static void hifn_reset_dma(struct hifn_device *dev, int full)
+{
+ hifn_stop_device(dev);
+
+ /*
+ * Setting poll frequency and others to 0.
+ */
+ hifn_write_1(dev, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
+ HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
+ mdelay(1);
+
+ /*
+ * Reset DMA.
+ */
+ if (full) {
+ hifn_write_1(dev, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MODE);
+ mdelay(1);
+ } else {
+ hifn_write_1(dev, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MODE |
+ HIFN_DMACNFG_MSTRESET);
+ hifn_reset_puc(dev);
+ }
+
+ hifn_write_1(dev, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
+ HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
+
+ hifn_reset_puc(dev);
+}
+
+static u32 hifn_next_signature(u_int32_t a, u_int cnt)
+{
+ int i;
+ u32 v;
+
+ for (i = 0; i < cnt; i++) {
+
+ /* get the parity */
+ v = a & 0x80080125;
+ v ^= v >> 16;
+ v ^= v >> 8;
+ v ^= v >> 4;
+ v ^= v >> 2;
+ v ^= v >> 1;
+
+ a = (v & 1) ^ (a << 1);
+ }
+
+ return a;
+}
+
+static struct pci2id {
+ u_short pci_vendor;
+ u_short pci_prod;
+ char card_id[13];
+} pci2id[] = {
+ {
+ PCI_VENDOR_ID_HIFN,
+ PCI_DEVICE_ID_HIFN_7955,
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00 }
+ },
+ {
+ PCI_VENDOR_ID_HIFN,
+ PCI_DEVICE_ID_HIFN_7956,
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00 }
+ }
+};
+
+#if defined(CONFIG_HW_RANDOM) || defined(CONFIG_HW_RANDOM_MODULE)
+static int hifn_rng_data_present(struct hwrng *rng, int wait)
+{
+ struct hifn_device *dev = (struct hifn_device *)rng->priv;
+ s64 nsec;
+
+ nsec = ktime_to_ns(ktime_sub(ktime_get(), dev->rngtime));
+ nsec -= dev->rng_wait_time;
+ if (nsec <= 0)
+ return 1;
+ if (!wait)
+ return 0;
+ ndelay(nsec);
+ return 1;
+}
+
+static int hifn_rng_data_read(struct hwrng *rng, u32 *data)
+{
+ struct hifn_device *dev = (struct hifn_device *)rng->priv;
+
+ *data = hifn_read_1(dev, HIFN_1_RNG_DATA);
+ dev->rngtime = ktime_get();
+ return 4;
+}
+
+static int hifn_register_rng(struct hifn_device *dev)
+{
+ /*
+ * We must wait at least 256 Pk_clk cycles between two reads of the rng.
+ */
+ dev->rng_wait_time = DIV_ROUND_UP(NSEC_PER_SEC, dev->pk_clk_freq) *
+ 256;
+
+ dev->rng.name = dev->name;
+ dev->rng.data_present = hifn_rng_data_present,
+ dev->rng.data_read = hifn_rng_data_read,
+ dev->rng.priv = (unsigned long)dev;
+
+ return hwrng_register(&dev->rng);
+}
+
+static void hifn_unregister_rng(struct hifn_device *dev)
+{
+ hwrng_unregister(&dev->rng);
+}
+#else
+#define hifn_register_rng(dev) 0
+#define hifn_unregister_rng(dev)
+#endif
+
+static int hifn_init_pubrng(struct hifn_device *dev)
+{
+ int i;
+
+ hifn_write_1(dev, HIFN_1_PUB_RESET, hifn_read_1(dev, HIFN_1_PUB_RESET) |
+ HIFN_PUBRST_RESET);
+
+ for (i=100; i > 0; --i) {
+ mdelay(1);
+
+ if ((hifn_read_1(dev, HIFN_1_PUB_RESET) & HIFN_PUBRST_RESET) == 0)
+ break;
+ }
+
+ if (!i)
+ dprintk("Chip %s: Failed to initialise public key engine.\n",
+ dev->name);
+ else {
+ hifn_write_1(dev, HIFN_1_PUB_IEN, HIFN_PUBIEN_DONE);
+ dev->dmareg |= HIFN_DMAIER_PUBDONE;
+ hifn_write_1(dev, HIFN_1_DMA_IER, dev->dmareg);
+
+ dprintk("Chip %s: Public key engine has been sucessfully "
+ "initialised.\n", dev->name);
+ }
+
+ /*
+ * Enable RNG engine.
+ */
+
+ hifn_write_1(dev, HIFN_1_RNG_CONFIG,
+ hifn_read_1(dev, HIFN_1_RNG_CONFIG) | HIFN_RNGCFG_ENA);
+ dprintk("Chip %s: RNG engine has been successfully initialised.\n",
+ dev->name);
+
+#if defined(CONFIG_HW_RANDOM) || defined(CONFIG_HW_RANDOM_MODULE)
+ /* First value must be discarded */
+ hifn_read_1(dev, HIFN_1_RNG_DATA);
+ dev->rngtime = ktime_get();
+#endif
+ return 0;
+}
+
+static int hifn_enable_crypto(struct hifn_device *dev)
+{
+ u32 dmacfg, addr;
+ char *offtbl = NULL;
+ int i;
+
+ for (i = 0; i < sizeof(pci2id)/sizeof(pci2id[0]); i++) {
+ if (pci2id[i].pci_vendor == dev->pdev->vendor &&
+ pci2id[i].pci_prod == dev->pdev->device) {
+ offtbl = pci2id[i].card_id;
+ break;
+ }
+ }
+
+ if (offtbl == NULL) {
+ dprintk("Chip %s: Unknown card!\n", dev->name);
+ return -ENODEV;
+ }
+
+ dmacfg = hifn_read_1(dev, HIFN_1_DMA_CNFG);
+
+ hifn_write_1(dev, HIFN_1_DMA_CNFG,
+ HIFN_DMACNFG_UNLOCK | HIFN_DMACNFG_MSTRESET |
+ HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
+ mdelay(1);
+ addr = hifn_read_1(dev, HIFN_1_UNLOCK_SECRET1);
+ mdelay(1);
+ hifn_write_1(dev, HIFN_1_UNLOCK_SECRET2, 0);
+ mdelay(1);
+
+ for (i=0; i<12; ++i) {
+ addr = hifn_next_signature(addr, offtbl[i] + 0x101);
+ hifn_write_1(dev, HIFN_1_UNLOCK_SECRET2, addr);
+
+ mdelay(1);
+ }
+ hifn_write_1(dev, HIFN_1_DMA_CNFG, dmacfg);
+
+ dprintk("Chip %s: %s.\n", dev->name, pci_name(dev->pdev));
+
+ return 0;
+}
+
+static void hifn_init_dma(struct hifn_device *dev)
+{
+ struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
+ u32 dptr = dev->desc_dma;
+ int i;
+
+ for (i=0; i<HIFN_D_CMD_RSIZE; ++i)
+ dma->cmdr[i].p = __cpu_to_le32(dptr +
+ offsetof(struct hifn_dma, command_bufs[i][0]));
+ for (i=0; i<HIFN_D_RES_RSIZE; ++i)
+ dma->resr[i].p = __cpu_to_le32(dptr +
+ offsetof(struct hifn_dma, result_bufs[i][0]));
+
+ /*
+ * Setup LAST descriptors.
+ */
+ dma->cmdr[HIFN_D_CMD_RSIZE].p = __cpu_to_le32(dptr +
+ offsetof(struct hifn_dma, cmdr[0]));
+ dma->srcr[HIFN_D_SRC_RSIZE].p = __cpu_to_le32(dptr +
+ offsetof(struct hifn_dma, srcr[0]));
+ dma->dstr[HIFN_D_DST_RSIZE].p = __cpu_to_le32(dptr +
+ offsetof(struct hifn_dma, dstr[0]));
+ dma->resr[HIFN_D_RES_RSIZE].p = __cpu_to_le32(dptr +
+ offsetof(struct hifn_dma, resr[0]));
+
+ dma->cmdu = dma->srcu = dma->dstu = dma->resu = 0;
+ dma->cmdi = dma->srci = dma->dsti = dma->resi = 0;
+ dma->cmdk = dma->srck = dma->dstk = dma->resk = 0;
+}
+
+/*
+ * Initialize the PLL. We need to know the frequency of the reference clock
+ * to calculate the optimal multiplier. For PCI we assume 66MHz, since that
+ * allows us to operate without the risk of overclocking the chip. If it
+ * actually uses 33MHz, the chip will operate at half the speed, this can be
+ * overriden by specifying the frequency as module parameter (pci33).
+ *
+ * Unfortunately the PCI clock is not very suitable since the HIFN needs a
+ * stable clock and the PCI clock frequency may vary, so the default is the
+ * external clock. There is no way to find out its frequency, we default to
+ * 66MHz since according to Mike Ham of HiFn, almost every board in existence
+ * has an external crystal populated at 66MHz.
+ */
+static void hifn_init_pll(struct hifn_device *dev)
+{
+ unsigned int freq, m;
+ u32 pllcfg;
+
+ pllcfg = HIFN_1_PLL | HIFN_PLL_RESERVED_1;
+
+ if (strncmp(hifn_pll_ref, "ext", 3) == 0)
+ pllcfg |= HIFN_PLL_REF_CLK_PLL;
+ else
+ pllcfg |= HIFN_PLL_REF_CLK_HBI;
+
+ if (hifn_pll_ref[3] != '\0')
+ freq = simple_strtoul(hifn_pll_ref + 3, NULL, 10);
+ else {
+ freq = 66;
+ printk(KERN_INFO "hifn795x: assuming %uMHz clock speed, "
+ "override with hifn_pll_ref=%.3s<frequency>\n",
+ freq, hifn_pll_ref);
+ }
+
+ m = HIFN_PLL_FCK_MAX / freq;
+
+ pllcfg |= (m / 2 - 1) << HIFN_PLL_ND_SHIFT;
+ if (m <= 8)
+ pllcfg |= HIFN_PLL_IS_1_8;
+ else
+ pllcfg |= HIFN_PLL_IS_9_12;
+
+ /* Select clock source and enable clock bypass */
+ hifn_write_1(dev, HIFN_1_PLL, pllcfg |
+ HIFN_PLL_PK_CLK_HBI | HIFN_PLL_PE_CLK_HBI | HIFN_PLL_BP);
+
+ /* Let the chip lock to the input clock */
+ mdelay(10);
+
+ /* Disable clock bypass */
+ hifn_write_1(dev, HIFN_1_PLL, pllcfg |
+ HIFN_PLL_PK_CLK_HBI | HIFN_PLL_PE_CLK_HBI);
+
+ /* Switch the engines to the PLL */
+ hifn_write_1(dev, HIFN_1_PLL, pllcfg |
+ HIFN_PLL_PK_CLK_PLL | HIFN_PLL_PE_CLK_PLL);
+
+ /*
+ * The Fpk_clk runs at half the total speed. Its frequency is needed to
+ * calculate the minimum time between two reads of the rng. Since 33MHz
+ * is actually 33.333... we overestimate the frequency here, resulting
+ * in slightly larger intervals.
+ */
+ dev->pk_clk_freq = 1000000 * (freq + 1) * m / 2;
+}
+
+static void hifn_init_registers(struct hifn_device *dev)
+{
+ u32 dptr = dev->desc_dma;
+
+ /* Initialization magic... */
+ hifn_write_0(dev, HIFN_0_PUCTRL, HIFN_PUCTRL_DMAENA);
+ hifn_write_0(dev, HIFN_0_FIFOCNFG, HIFN_FIFOCNFG_THRESHOLD);
+ hifn_write_0(dev, HIFN_0_PUIER, HIFN_PUIER_DSTOVER);
+
+ /* write all 4 ring address registers */
+ hifn_write_1(dev, HIFN_1_DMA_CRAR, __cpu_to_le32(dptr +
+ offsetof(struct hifn_dma, cmdr[0])));
+ hifn_write_1(dev, HIFN_1_DMA_SRAR, __cpu_to_le32(dptr +
+ offsetof(struct hifn_dma, srcr[0])));
+ hifn_write_1(dev, HIFN_1_DMA_DRAR, __cpu_to_le32(dptr +
+ offsetof(struct hifn_dma, dstr[0])));
+ hifn_write_1(dev, HIFN_1_DMA_RRAR, __cpu_to_le32(dptr +
+ offsetof(struct hifn_dma, resr[0])));
+
+ mdelay(2);
+#if 0
+ hifn_write_1(dev, HIFN_1_DMA_CSR,
+ HIFN_DMACSR_D_CTRL_DIS | HIFN_DMACSR_R_CTRL_DIS |
+ HIFN_DMACSR_S_CTRL_DIS | HIFN_DMACSR_C_CTRL_DIS |
+ HIFN_DMACSR_D_ABORT | HIFN_DMACSR_D_DONE | HIFN_DMACSR_D_LAST |
+ HIFN_DMACSR_D_WAIT | HIFN_DMACSR_D_OVER |
+ HIFN_DMACSR_R_ABORT | HIFN_DMACSR_R_DONE | HIFN_DMACSR_R_LAST |
+ HIFN_DMACSR_R_WAIT | HIFN_DMACSR_R_OVER |
+ HIFN_DMACSR_S_ABORT | HIFN_DMACSR_S_DONE | HIFN_DMACSR_S_LAST |
+ HIFN_DMACSR_S_WAIT |
+ HIFN_DMACSR_C_ABORT | HIFN_DMACSR_C_DONE | HIFN_DMACSR_C_LAST |
+ HIFN_DMACSR_C_WAIT |
+ HIFN_DMACSR_ENGINE |
+ HIFN_DMACSR_PUBDONE);
+#else
+ hifn_write_1(dev, HIFN_1_DMA_CSR,
+ HIFN_DMACSR_C_CTRL_ENA | HIFN_DMACSR_S_CTRL_ENA |
+ HIFN_DMACSR_D_CTRL_ENA | HIFN_DMACSR_R_CTRL_ENA |
+ HIFN_DMACSR_D_ABORT | HIFN_DMACSR_D_DONE | HIFN_DMACSR_D_LAST |
+ HIFN_DMACSR_D_WAIT | HIFN_DMACSR_D_OVER |
+ HIFN_DMACSR_R_ABORT | HIFN_DMACSR_R_DONE | HIFN_DMACSR_R_LAST |
+ HIFN_DMACSR_R_WAIT | HIFN_DMACSR_R_OVER |
+ HIFN_DMACSR_S_ABORT | HIFN_DMACSR_S_DONE | HIFN_DMACSR_S_LAST |
+ HIFN_DMACSR_S_WAIT |
+ HIFN_DMACSR_C_ABORT | HIFN_DMACSR_C_DONE | HIFN_DMACSR_C_LAST |
+ HIFN_DMACSR_C_WAIT |
+ HIFN_DMACSR_ENGINE |
+ HIFN_DMACSR_PUBDONE);
+#endif
+ hifn_read_1(dev, HIFN_1_DMA_CSR);
+
+ dev->dmareg |= HIFN_DMAIER_R_DONE | HIFN_DMAIER_C_ABORT |
+ HIFN_DMAIER_D_OVER | HIFN_DMAIER_R_OVER |
+ HIFN_DMAIER_S_ABORT | HIFN_DMAIER_D_ABORT | HIFN_DMAIER_R_ABORT |
+ HIFN_DMAIER_ENGINE;
+ dev->dmareg &= ~HIFN_DMAIER_C_WAIT;
+
+ hifn_write_1(dev, HIFN_1_DMA_IER, dev->dmareg);
+ hifn_read_1(dev, HIFN_1_DMA_IER);
+#if 0
+ hifn_write_0(dev, HIFN_0_PUCNFG, HIFN_PUCNFG_ENCCNFG |
+ HIFN_PUCNFG_DRFR_128 | HIFN_PUCNFG_TCALLPHASES |
+ HIFN_PUCNFG_TCDRVTOTEM | HIFN_PUCNFG_BUS32 |
+ HIFN_PUCNFG_DRAM);
+#else
+ hifn_write_0(dev, HIFN_0_PUCNFG, 0x10342);
+#endif
+ hifn_init_pll(dev);
+
+ hifn_write_0(dev, HIFN_0_PUISR, HIFN_PUISR_DSTOVER);
+ hifn_write_1(dev, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
+ HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE | HIFN_DMACNFG_LAST |
+ ((HIFN_POLL_FREQUENCY << 16 ) & HIFN_DMACNFG_POLLFREQ) |
+ ((HIFN_POLL_SCALAR << 8) & HIFN_DMACNFG_POLLINVAL));
+}
+
+static int hifn_setup_base_command(struct hifn_device *dev, u8 *buf,
+ unsigned dlen, unsigned slen, u16 mask, u8 snum)
+{
+ struct hifn_base_command *base_cmd;
+ u8 *buf_pos = buf;
+
+ base_cmd = (struct hifn_base_command *)buf_pos;
+ base_cmd->masks = __cpu_to_le16(mask);
+ base_cmd->total_source_count =
+ __cpu_to_le16(slen & HIFN_BASE_CMD_LENMASK_LO);
+ base_cmd->total_dest_count =
+ __cpu_to_le16(dlen & HIFN_BASE_CMD_LENMASK_LO);
+
+ dlen >>= 16;
+ slen >>= 16;
+ base_cmd->session_num = __cpu_to_le16(snum |
+ ((slen << HIFN_BASE_CMD_SRCLEN_S) & HIFN_BASE_CMD_SRCLEN_M) |
+ ((dlen << HIFN_BASE_CMD_DSTLEN_S) & HIFN_BASE_CMD_DSTLEN_M));
+
+ return sizeof(struct hifn_base_command);
+}
+
+static int hifn_setup_crypto_command(struct hifn_device *dev,
+ u8 *buf, unsigned dlen, unsigned slen,
+ u8 *key, int keylen, u8 *iv, int ivsize, u16 mode)
+{
+ struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
+ struct hifn_crypt_command *cry_cmd;
+ u8 *buf_pos = buf;
+ u16 cmd_len;
+
+ cry_cmd = (struct hifn_crypt_command *)buf_pos;
+
+ cry_cmd->source_count = __cpu_to_le16(dlen & 0xffff);
+ dlen >>= 16;
+ cry_cmd->masks = __cpu_to_le16(mode |
+ ((dlen << HIFN_CRYPT_CMD_SRCLEN_S) &
+ HIFN_CRYPT_CMD_SRCLEN_M));
+ cry_cmd->header_skip = 0;
+ cry_cmd->reserved = 0;
+
+ buf_pos += sizeof(struct hifn_crypt_command);
+
+ dma->cmdu++;
+ if (dma->cmdu > 1) {
+ dev->dmareg |= HIFN_DMAIER_C_WAIT;
+ hifn_write_1(dev, HIFN_1_DMA_IER, dev->dmareg);
+ }
+
+ if (keylen) {
+ memcpy(buf_pos, key, keylen);
+ buf_pos += keylen;
+ }
+ if (ivsize) {
+ memcpy(buf_pos, iv, ivsize);
+ buf_pos += ivsize;
+ }
+
+ cmd_len = buf_pos - buf;
+
+ return cmd_len;
+}
+
+static int hifn_setup_src_desc(struct hifn_device *dev, struct page *page,
+ unsigned int offset, unsigned int size)
+{
+ struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
+ int idx;
+ dma_addr_t addr;
+
+ addr = pci_map_page(dev->pdev, page, offset, size, PCI_DMA_TODEVICE);
+
+ idx = dma->srci;
+
+ dma->srcr[idx].p = __cpu_to_le32(addr);
+ dma->srcr[idx].l = __cpu_to_le32(size) | HIFN_D_VALID |
+ HIFN_D_MASKDONEIRQ | HIFN_D_NOINVALID | HIFN_D_LAST;
+
+ if (++idx == HIFN_D_SRC_RSIZE) {
+ dma->srcr[idx].l = __cpu_to_le32(HIFN_D_VALID |
+ HIFN_D_JUMP |
+ HIFN_D_MASKDONEIRQ | HIFN_D_LAST);
+ idx = 0;
+ }
+
+ dma->srci = idx;
+ dma->srcu++;
+
+ if (!(dev->flags & HIFN_FLAG_SRC_BUSY)) {
+ hifn_write_1(dev, HIFN_1_DMA_CSR, HIFN_DMACSR_S_CTRL_ENA);
+ dev->flags |= HIFN_FLAG_SRC_BUSY;
+ }
+
+ return size;
+}
+
+static void hifn_setup_res_desc(struct hifn_device *dev)
+{
+ struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
+
+ dma->resr[dma->resi].l = __cpu_to_le32(HIFN_USED_RESULT |
+ HIFN_D_VALID | HIFN_D_LAST);
+ /*
+ * dma->resr[dma->resi].l = __cpu_to_le32(HIFN_MAX_RESULT | HIFN_D_VALID |
+ * HIFN_D_LAST | HIFN_D_NOINVALID);
+ */
+
+ if (++dma->resi == HIFN_D_RES_RSIZE) {
+ dma->resr[HIFN_D_RES_RSIZE].l = __cpu_to_le32(HIFN_D_VALID |
+ HIFN_D_JUMP | HIFN_D_MASKDONEIRQ | HIFN_D_LAST);
+ dma->resi = 0;
+ }
+
+ dma->resu++;
+
+ if (!(dev->flags & HIFN_FLAG_RES_BUSY)) {
+ hifn_write_1(dev, HIFN_1_DMA_CSR, HIFN_DMACSR_R_CTRL_ENA);
+ dev->flags |= HIFN_FLAG_RES_BUSY;
+ }
+}
+
+static void hifn_setup_dst_desc(struct hifn_device *dev, struct page *page,
+ unsigned offset, unsigned size)
+{
+ struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
+ int idx;
+ dma_addr_t addr;
+
+ addr = pci_map_page(dev->pdev, page, offset, size, PCI_DMA_FROMDEVICE);
+
+ idx = dma->dsti;
+ dma->dstr[idx].p = __cpu_to_le32(addr);
+ dma->dstr[idx].l = __cpu_to_le32(size | HIFN_D_VALID |
+ HIFN_D_MASKDONEIRQ | HIFN_D_NOINVALID | HIFN_D_LAST);
+
+ if (++idx == HIFN_D_DST_RSIZE) {
+ dma->dstr[idx].l = __cpu_to_le32(HIFN_D_VALID |
+ HIFN_D_JUMP | HIFN_D_MASKDONEIRQ |
+ HIFN_D_LAST | HIFN_D_NOINVALID);
+ idx = 0;
+ }
+ dma->dsti = idx;
+ dma->dstu++;
+
+ if (!(dev->flags & HIFN_FLAG_DST_BUSY)) {
+ hifn_write_1(dev, HIFN_1_DMA_CSR, HIFN_DMACSR_D_CTRL_ENA);
+ dev->flags |= HIFN_FLAG_DST_BUSY;
+ }
+}
+
+static int hifn_setup_dma(struct hifn_device *dev, struct page *spage, unsigned int soff,
+ struct page *dpage, unsigned int doff, unsigned int nbytes, void *priv,
+ struct hifn_context *ctx)
+{
+ struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
+ int cmd_len, sa_idx;
+ u8 *buf, *buf_pos;
+ u16 mask;
+
+ dprintk("%s: spage: %p, soffset: %u, dpage: %p, doffset: %u, nbytes: %u, priv: %p, ctx: %p.\n",
+ dev->name, spage, soff, dpage, doff, nbytes, priv, ctx);
+
+ sa_idx = dma->resi;
+
+ hifn_setup_src_desc(dev, spage, soff, nbytes);
+
+ buf_pos = buf = dma->command_bufs[dma->cmdi];
+
+ mask = 0;
+ switch (ctx->op) {
+ case ACRYPTO_OP_DECRYPT:
+ mask = HIFN_BASE_CMD_CRYPT | HIFN_BASE_CMD_DECODE;
+ break;
+ case ACRYPTO_OP_ENCRYPT:
+ mask = HIFN_BASE_CMD_CRYPT;
+ break;
+ case ACRYPTO_OP_HMAC:
+ mask = HIFN_BASE_CMD_MAC;
+ break;
+ default:
+ goto err_out;
+ }
+
+ buf_pos += hifn_setup_base_command(dev, buf_pos, nbytes,
+ nbytes, mask, dev->snum);
+
+ if (ctx->op == ACRYPTO_OP_ENCRYPT || ctx->op == ACRYPTO_OP_DECRYPT) {
+ u16 md = 0;
+
+ if (ctx->keysize)
+ md |= HIFN_CRYPT_CMD_NEW_KEY;
+ if (ctx->iv && ctx->mode != ACRYPTO_MODE_ECB)
+ md |= HIFN_CRYPT_CMD_NEW_IV;
+
+ switch (ctx->mode) {
+ case ACRYPTO_MODE_ECB:
+ md |= HIFN_CRYPT_CMD_MODE_ECB;
+ break;
+ case ACRYPTO_MODE_CBC:
+ md |= HIFN_CRYPT_CMD_MODE_CBC;
+ break;
+ case ACRYPTO_MODE_CFB:
+ md |= HIFN_CRYPT_CMD_MODE_CFB;
+ break;
+ case ACRYPTO_MODE_OFB:
+ md |= HIFN_CRYPT_CMD_MODE_OFB;
+ break;
+ default:
+ goto err_out;
+ }
+
+ switch (ctx->type) {
+ case ACRYPTO_TYPE_AES_128:
+ if (ctx->keysize != 16)
+ goto err_out;
+ md |= HIFN_CRYPT_CMD_KSZ_128 |
+ HIFN_CRYPT_CMD_ALG_AES;
+ break;
+ case ACRYPTO_TYPE_AES_192:
+ if (ctx->keysize != 24)
+ goto err_out;
+ md |= HIFN_CRYPT_CMD_KSZ_192 |
+ HIFN_CRYPT_CMD_ALG_AES;
+ break;
+ case ACRYPTO_TYPE_AES_256:
+ if (ctx->keysize != 32)
+ goto err_out;
+ md |= HIFN_CRYPT_CMD_KSZ_256 |
+ HIFN_CRYPT_CMD_ALG_AES;
+ break;
+ case ACRYPTO_TYPE_3DES:
+ if (ctx->keysize != 24)
+ goto err_out;
+ md |= HIFN_CRYPT_CMD_ALG_3DES;
+ break;
+ case ACRYPTO_TYPE_DES:
+ if (ctx->keysize != 8)
+ goto err_out;
+ md |= HIFN_CRYPT_CMD_ALG_DES;
+ break;
+ default:
+ goto err_out;
+ }
+
+ buf_pos += hifn_setup_crypto_command(dev, buf_pos,
+ nbytes, nbytes, ctx->key, ctx->keysize,
+ ctx->iv, ctx->ivsize, md);
+ }
+
+ dev->sa[sa_idx] = priv;
+
+ cmd_len = buf_pos - buf;
+ dma->cmdr[dma->cmdi].l = __cpu_to_le32(cmd_len | HIFN_D_VALID |
+ HIFN_D_LAST | HIFN_D_MASKDONEIRQ);
+
+ if (++dma->cmdi == HIFN_D_CMD_RSIZE) {
+ dma->cmdr[dma->cmdi].l = __cpu_to_le32(HIFN_MAX_COMMAND |
+ HIFN_D_VALID | HIFN_D_LAST |
+ HIFN_D_MASKDONEIRQ | HIFN_D_JUMP);
+ dma->cmdi = 0;
+ } else
+ dma->cmdr[dma->cmdi-1].l |= __cpu_to_le32(HIFN_D_VALID);
+
+ if (!(dev->flags & HIFN_FLAG_CMD_BUSY)) {
+ hifn_write_1(dev, HIFN_1_DMA_CSR, HIFN_DMACSR_C_CTRL_ENA);
+ dev->flags |= HIFN_FLAG_CMD_BUSY;
+ }
+
+ hifn_setup_dst_desc(dev, dpage, doff, nbytes);
+ hifn_setup_res_desc(dev);
+
+ return 0;
+
+err_out:
+ return -EINVAL;
+}
+
+static int ablkcipher_walk_init(struct ablkcipher_walk *w,
+ int num, gfp_t gfp_flags)
+{
+ int i;
+
+ num = min(ASYNC_SCATTERLIST_CACHE, num);
+ sg_init_table(w->cache, num);
+
+ w->num = 0;
+ for (i=0; i<num; ++i) {
+ struct page *page = alloc_page(gfp_flags);
+ struct scatterlist *s;
+
+ if (!page)
+ break;
+
+ s = &w->cache[i];
+
+ sg_set_page(s, page, PAGE_SIZE, 0);
+ w->num++;
+ }
+
+ return i;
+}
+
+static void ablkcipher_walk_exit(struct ablkcipher_walk *w)
+{
+ int i;
+
+ for (i=0; i<w->num; ++i) {
+ struct scatterlist *s = &w->cache[i];
+
+ __free_page(sg_page(s));
+
+ s->length = 0;
+ }
+
+ w->num = 0;
+}
+
+static int ablkcipher_add(void *daddr, unsigned int *drestp, struct scatterlist *src,
+ unsigned int size, unsigned int *nbytesp)
+{
+ unsigned int copy, drest = *drestp, nbytes = *nbytesp;
+ int idx = 0;
+ void *saddr;
+
+ if (drest < size || size > nbytes)
+ return -EINVAL;
+
+ while (size) {
+ copy = min(drest, src->length);
+
+ saddr = kmap_atomic(sg_page(src), KM_SOFTIRQ1);
+ memcpy(daddr, saddr + src->offset, copy);
+ kunmap_atomic(saddr, KM_SOFTIRQ1);
+
+ size -= copy;
+ drest -= copy;
+ nbytes -= copy;
+ daddr += copy;
+
+ dprintk("%s: copy: %u, size: %u, drest: %u, nbytes: %u.\n",
+ __func__, copy, size, drest, nbytes);
+
+ src++;
+ idx++;
+ }
+
+ *nbytesp = nbytes;
+ *drestp = drest;
+
+ return idx;
+}
+
+static int ablkcipher_walk(struct ablkcipher_request *req,
+ struct ablkcipher_walk *w)
+{
+ unsigned blocksize =
+ crypto_ablkcipher_blocksize(crypto_ablkcipher_reqtfm(req));
+ unsigned alignmask =
+ crypto_ablkcipher_alignmask(crypto_ablkcipher_reqtfm(req));
+ struct scatterlist *src, *dst, *t;
+ void *daddr;
+ unsigned int nbytes = req->nbytes, offset, copy, diff;
+ int idx, tidx, err;
+
+ tidx = idx = 0;
+ offset = 0;
+ while (nbytes) {
+ if (idx >= w->num && (w->flags & ASYNC_FLAGS_MISALIGNED))
+ return -EINVAL;
+
+ src = &req->src[idx];
+ dst = &req->dst[idx];
+
+ dprintk("\n%s: slen: %u, dlen: %u, soff: %u, doff: %u, offset: %u, "
+ "blocksize: %u, nbytes: %u.\n",
+ __func__, src->length, dst->length, src->offset,
+ dst->offset, offset, blocksize, nbytes);
+
+ if (src->length & (blocksize - 1) ||
+ src->offset & (alignmask - 1) ||
+ dst->length & (blocksize - 1) ||
+ dst->offset & (alignmask - 1) ||
+ offset) {
+ unsigned slen = src->length - offset;
+ unsigned dlen = PAGE_SIZE;
+
+ t = &w->cache[idx];
+
+ daddr = kmap_atomic(sg_page(t), KM_SOFTIRQ0);
+ err = ablkcipher_add(daddr, &dlen, src, slen, &nbytes);
+ if (err < 0)
+ goto err_out_unmap;
+
+ idx += err;
+
+ copy = slen & ~(blocksize - 1);
+ diff = slen & (blocksize - 1);
+
+ if (dlen < nbytes) {
+ /*
+ * Destination page does not have enough space
+ * to put there additional blocksized chunk,
+ * so we mark that page as containing only
+ * blocksize aligned chunks:
+ * t->length = (slen & ~(blocksize - 1));
+ * and increase number of bytes to be processed
+ * in next chunk:
+ * nbytes += diff;
+ */
+ nbytes += diff;
+
+ /*
+ * Temporary of course...
+ * Kick author if you will catch this one.
+ */
+ printk(KERN_ERR "%s: dlen: %u, nbytes: %u,"
+ "slen: %u, offset: %u.\n",
+ __func__, dlen, nbytes, slen, offset);
+ printk(KERN_ERR "%s: please contact author to fix this "
+ "issue, generally you should not catch "
+ "this path under any condition but who "
+ "knows how did you use crypto code.\n"
+ "Thank you.\n", __func__);
+ BUG();
+ } else {
+ copy += diff + nbytes;
+
+ src = &req->src[idx];
+
+ err = ablkcipher_add(daddr + slen, &dlen, src, nbytes, &nbytes);
+ if (err < 0)
+ goto err_out_unmap;
+
+ idx += err;
+ }
+
+ t->length = copy;
+ t->offset = offset;
+
+ kunmap_atomic(daddr, KM_SOFTIRQ0);
+ } else {
+ nbytes -= src->length;
+ idx++;
+ }
+
+ tidx++;
+ }
+
+ return tidx;
+
+err_out_unmap:
+ kunmap_atomic(daddr, KM_SOFTIRQ0);
+ return err;
+}
+
+static int hifn_setup_session(struct ablkcipher_request *req)
+{
+ struct hifn_context *ctx = crypto_tfm_ctx(req->base.tfm);
+ struct hifn_device *dev = ctx->dev;
+ struct page *spage, *dpage;
+ unsigned long soff, doff, flags;
+ unsigned int nbytes = req->nbytes, idx = 0, len;
+ int err = -EINVAL, sg_num;
+ struct scatterlist *src, *dst, *t;
+ unsigned blocksize =
+ crypto_ablkcipher_blocksize(crypto_ablkcipher_reqtfm(req));
+ unsigned alignmask =
+ crypto_ablkcipher_alignmask(crypto_ablkcipher_reqtfm(req));
+
+ if (ctx->iv && !ctx->ivsize && ctx->mode != ACRYPTO_MODE_ECB)
+ goto err_out_exit;
+
+ ctx->walk.flags = 0;
+
+ while (nbytes) {
+ src = &req->src[idx];
+ dst = &req->dst[idx];
+
+ if (src->length & (blocksize - 1) ||
+ src->offset & (alignmask - 1) ||
+ dst->length & (blocksize - 1) ||
+ dst->offset & (alignmask - 1)) {
+ ctx->walk.flags |= ASYNC_FLAGS_MISALIGNED;
+ }
+
+ nbytes -= src->length;
+ idx++;
+ }
+
+ if (ctx->walk.flags & ASYNC_FLAGS_MISALIGNED) {
+ err = ablkcipher_walk_init(&ctx->walk, idx, GFP_ATOMIC);
+ if (err < 0)
+ return err;
+ }
+
+ nbytes = req->nbytes;
+ idx = 0;
+
+ sg_num = ablkcipher_walk(req, &ctx->walk);
+
+ atomic_set(&ctx->sg_num, sg_num);
+
+ spin_lock_irqsave(&dev->lock, flags);
+ if (dev->started + sg_num > HIFN_QUEUE_LENGTH) {
+ err = -EAGAIN;
+ goto err_out;
+ }
+
+ dev->snum++;
+ dev->started += sg_num;
+
+ while (nbytes) {
+ src = &req->src[idx];
+ dst = &req->dst[idx];
+ t = &ctx->walk.cache[idx];
+
+ if (t->length) {
+ spage = dpage = sg_page(t);
+ soff = doff = 0;
+ len = t->length;
+ } else {
+ spage = sg_page(src);
+ soff = src->offset;
+
+ dpage = sg_page(dst);
+ doff = dst->offset;
+
+ len = dst->length;
+ }
+
+ idx++;
+
+ err = hifn_setup_dma(dev, spage, soff, dpage, doff, nbytes,
+ req, ctx);
+ if (err)
+ goto err_out;
+
+ nbytes -= len;
+ }
+
+ dev->active = HIFN_DEFAULT_ACTIVE_NUM;
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ return 0;
+
+err_out:
+ spin_unlock_irqrestore(&dev->lock, flags);
+err_out_exit:
+ if (err && printk_ratelimit())
+ dprintk("%s: iv: %p [%d], key: %p [%d], mode: %u, op: %u, "
+ "type: %u, err: %d.\n",
+ dev->name, ctx->iv, ctx->ivsize,
+ ctx->key, ctx->keysize,
+ ctx->mode, ctx->op, ctx->type, err);
+
+ return err;
+}
+
+static int hifn_test(struct hifn_device *dev, int encdec, u8 snum)
+{
+ int n, err;
+ u8 src[16];
+ struct hifn_context ctx;
+ u8 fips_aes_ecb_from_zero[16] = {
+ 0x66, 0xE9, 0x4B, 0xD4,
+ 0xEF, 0x8A, 0x2C, 0x3B,
+ 0x88, 0x4C, 0xFA, 0x59,
+ 0xCA, 0x34, 0x2B, 0x2E};
+
+ memset(src, 0, sizeof(src));
+ memset(ctx.key, 0, sizeof(ctx.key));
+
+ ctx.dev = dev;
+ ctx.keysize = 16;
+ ctx.ivsize = 0;
+ ctx.iv = NULL;
+ ctx.op = (encdec)?ACRYPTO_OP_ENCRYPT:ACRYPTO_OP_DECRYPT;
+ ctx.mode = ACRYPTO_MODE_ECB;
+ ctx.type = ACRYPTO_TYPE_AES_128;
+ atomic_set(&ctx.sg_num, 1);
+
+ err = hifn_setup_dma(dev,
+ virt_to_page(src), offset_in_page(src),
+ virt_to_page(src), offset_in_page(src),
+ sizeof(src), NULL, &ctx);
+ if (err)
+ goto err_out;
+
+ msleep(200);
+
+ dprintk("%s: decoded: ", dev->name);
+ for (n=0; n<sizeof(src); ++n)
+ dprintk("%02x ", src[n]);
+ dprintk("\n");
+ dprintk("%s: FIPS : ", dev->name);
+ for (n=0; n<sizeof(fips_aes_ecb_from_zero); ++n)
+ dprintk("%02x ", fips_aes_ecb_from_zero[n]);
+ dprintk("\n");
+
+ if (!memcmp(src, fips_aes_ecb_from_zero, sizeof(fips_aes_ecb_from_zero))) {
+ printk(KERN_INFO "%s: AES 128 ECB test has been successfully "
+ "passed.\n", dev->name);
+ return 0;
+ }
+
+err_out:
+ printk(KERN_INFO "%s: AES 128 ECB test has been failed.\n", dev->name);
+ return -1;
+}
+
+static int hifn_start_device(struct hifn_device *dev)
+{
+ int err;
+
+ hifn_reset_dma(dev, 1);
+
+ err = hifn_enable_crypto(dev);
+ if (err)
+ return err;
+
+ hifn_reset_puc(dev);
+
+ hifn_init_dma(dev);
+
+ hifn_init_registers(dev);
+
+ hifn_init_pubrng(dev);
+
+ return 0;
+}
+
+static int ablkcipher_get(void *saddr, unsigned int *srestp, unsigned int offset,
+ struct scatterlist *dst, unsigned int size, unsigned int *nbytesp)
+{
+ unsigned int srest = *srestp, nbytes = *nbytesp, copy;
+ void *daddr;
+ int idx = 0;
+
+ if (srest < size || size > nbytes)
+ return -EINVAL;
+
+ while (size) {
+
+ copy = min(dst->length, srest);
+
+ daddr = kmap_atomic(sg_page(dst), KM_IRQ0);
+ memcpy(daddr + dst->offset + offset, saddr, copy);
+ kunmap_atomic(daddr, KM_IRQ0);
+
+ nbytes -= copy;
+ size -= copy;
+ srest -= copy;
+ saddr += copy;
+ offset = 0;
+
+ dprintk("%s: copy: %u, size: %u, srest: %u, nbytes: %u.\n",
+ __func__, copy, size, srest, nbytes);
+
+ dst++;
+ idx++;
+ }
+
+ *nbytesp = nbytes;
+ *srestp = srest;
+
+ return idx;
+}
+
+static void hifn_process_ready(struct ablkcipher_request *req, int error)
+{
+ struct hifn_context *ctx = crypto_tfm_ctx(req->base.tfm);
+ struct hifn_device *dev;
+
+ dprintk("%s: req: %p, ctx: %p.\n", __func__, req, ctx);
+
+ dev = ctx->dev;
+ dprintk("%s: req: %p, started: %d, sg_num: %d.\n",
+ __func__, req, dev->started, atomic_read(&ctx->sg_num));
+
+ if (--dev->started < 0)
+ BUG();
+
+ if (atomic_dec_and_test(&ctx->sg_num)) {
+ unsigned int nbytes = req->nbytes;
+ int idx = 0, err;
+ struct scatterlist *dst, *t;
+ void *saddr;
+
+ if (ctx->walk.flags & ASYNC_FLAGS_MISALIGNED) {
+ while (nbytes) {
+ t = &ctx->walk.cache[idx];
+ dst = &req->dst[idx];
+
+ dprintk("\n%s: sg_page(t): %p, t->length: %u, "
+ "sg_page(dst): %p, dst->length: %u, "
+ "nbytes: %u.\n",
+ __func__, sg_page(t), t->length,
+ sg_page(dst), dst->length, nbytes);
+
+ if (!t->length) {
+ nbytes -= dst->length;
+ idx++;
+ continue;
+ }
+
+ saddr = kmap_atomic(sg_page(t), KM_IRQ1);
+
+ err = ablkcipher_get(saddr, &t->length, t->offset,
+ dst, nbytes, &nbytes);
+ if (err < 0) {
+ kunmap_atomic(saddr, KM_IRQ1);
+ break;
+ }
+
+ idx += err;
+ kunmap_atomic(saddr, KM_IRQ1);
+ }
+
+ ablkcipher_walk_exit(&ctx->walk);
+ }
+
+ req->base.complete(&req->base, error);
+ }
+}
+
+static void hifn_check_for_completion(struct hifn_device *dev, int error)
+{
+ int i;
+ struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
+
+ for (i=0; i<HIFN_D_RES_RSIZE; ++i) {
+ struct hifn_desc *d = &dma->resr[i];
+
+ if (!(d->l & __cpu_to_le32(HIFN_D_VALID)) && dev->sa[i]) {
+ dev->success++;
+ dev->reset = 0;
+ hifn_process_ready(dev->sa[i], error);
+ dev->sa[i] = NULL;
+ }
+
+ if (d->l & __cpu_to_le32(HIFN_D_DESTOVER | HIFN_D_OVER))
+ if (printk_ratelimit())
+ printk("%s: overflow detected [d: %u, o: %u] "
+ "at %d resr: l: %08x, p: %08x.\n",
+ dev->name,
+ !!(d->l & __cpu_to_le32(HIFN_D_DESTOVER)),
+ !!(d->l & __cpu_to_le32(HIFN_D_OVER)),
+ i, d->l, d->p);
+ }
+}
+
+static void hifn_clear_rings(struct hifn_device *dev)
+{
+ struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
+ int i, u;
+
+ dprintk("%s: ring cleanup 1: i: %d.%d.%d.%d, u: %d.%d.%d.%d, "
+ "k: %d.%d.%d.%d.\n",
+ dev->name,
+ dma->cmdi, dma->srci, dma->dsti, dma->resi,
+ dma->cmdu, dma->srcu, dma->dstu, dma->resu,
+ dma->cmdk, dma->srck, dma->dstk, dma->resk);
+
+ i = dma->resk; u = dma->resu;
+ while (u != 0) {
+ if (dma->resr[i].l & __cpu_to_le32(HIFN_D_VALID))
+ break;
+
+ if (i != HIFN_D_RES_RSIZE)
+ u--;
+
+ if (++i == (HIFN_D_RES_RSIZE + 1))
+ i = 0;
+ }
+ dma->resk = i; dma->resu = u;
+
+ i = dma->srck; u = dma->srcu;
+ while (u != 0) {
+ if (i == HIFN_D_SRC_RSIZE)
+ i = 0;
+ if (dma->srcr[i].l & __cpu_to_le32(HIFN_D_VALID))
+ break;
+ i++, u--;
+ }
+ dma->srck = i; dma->srcu = u;
+
+ i = dma->cmdk; u = dma->cmdu;
+ while (u != 0) {
+ if (dma->cmdr[i].l & __cpu_to_le32(HIFN_D_VALID))
+ break;
+ if (i != HIFN_D_CMD_RSIZE)
+ u--;
+ if (++i == (HIFN_D_CMD_RSIZE + 1))
+ i = 0;
+ }
+ dma->cmdk = i; dma->cmdu = u;
+
+ i = dma->dstk; u = dma->dstu;
+ while (u != 0) {
+ if (i == HIFN_D_DST_RSIZE)
+ i = 0;
+ if (dma->dstr[i].l & __cpu_to_le32(HIFN_D_VALID))
+ break;
+ i++, u--;
+ }
+ dma->dstk = i; dma->dstu = u;
+
+ dprintk("%s: ring cleanup 2: i: %d.%d.%d.%d, u: %d.%d.%d.%d, "
+ "k: %d.%d.%d.%d.\n",
+ dev->name,
+ dma->cmdi, dma->srci, dma->dsti, dma->resi,
+ dma->cmdu, dma->srcu, dma->dstu, dma->resu,
+ dma->cmdk, dma->srck, dma->dstk, dma->resk);
+}
+
+static void hifn_work(struct work_struct *work)
+{
+ struct delayed_work *dw = container_of(work, struct delayed_work, work);
+ struct hifn_device *dev = container_of(dw, struct hifn_device, work);
+ unsigned long flags;
+ int reset = 0;
+ u32 r = 0;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ if (dev->active == 0) {
+ struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
+
+ if (dma->cmdu == 0 && (dev->flags & HIFN_FLAG_CMD_BUSY)) {
+ dev->flags &= ~HIFN_FLAG_CMD_BUSY;
+ r |= HIFN_DMACSR_C_CTRL_DIS;
+ }
+ if (dma->srcu == 0 && (dev->flags & HIFN_FLAG_SRC_BUSY)) {
+ dev->flags &= ~HIFN_FLAG_SRC_BUSY;
+ r |= HIFN_DMACSR_S_CTRL_DIS;
+ }
+ if (dma->dstu == 0 && (dev->flags & HIFN_FLAG_DST_BUSY)) {
+ dev->flags &= ~HIFN_FLAG_DST_BUSY;
+ r |= HIFN_DMACSR_D_CTRL_DIS;
+ }
+ if (dma->resu == 0 && (dev->flags & HIFN_FLAG_RES_BUSY)) {
+ dev->flags &= ~HIFN_FLAG_RES_BUSY;
+ r |= HIFN_DMACSR_R_CTRL_DIS;
+ }
+ if (r)
+ hifn_write_1(dev, HIFN_1_DMA_CSR, r);
+ } else
+ dev->active--;
+
+ if (dev->prev_success == dev->success && dev->started)
+ reset = 1;
+ dev->prev_success = dev->success;
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ if (reset) {
+ dprintk("%s: r: %08x, active: %d, started: %d, "
+ "success: %lu: reset: %d.\n",
+ dev->name, r, dev->active, dev->started,
+ dev->success, reset);
+
+ if (++dev->reset >= 5) {
+ dprintk("%s: really hard reset.\n", dev->name);
+ hifn_reset_dma(dev, 1);
+ hifn_stop_device(dev);
+ hifn_start_device(dev);
+ dev->reset = 0;
+ }
+
+ spin_lock_irqsave(&dev->lock, flags);
+ hifn_check_for_completion(dev, -EBUSY);
+ hifn_clear_rings(dev);
+ dev->started = 0;
+ spin_unlock_irqrestore(&dev->lock, flags);
+ }
+
+ schedule_delayed_work(&dev->work, HZ);
+}
+
+static irqreturn_t hifn_interrupt(int irq, void *data)
+{
+ struct hifn_device *dev = (struct hifn_device *)data;
+ struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
+ u32 dmacsr, restart;
+
+ dmacsr = hifn_read_1(dev, HIFN_1_DMA_CSR);
+
+ dprintk("%s: 1 dmacsr: %08x, dmareg: %08x, res: %08x [%d], "
+ "i: %d.%d.%d.%d, u: %d.%d.%d.%d.\n",
+ dev->name, dmacsr, dev->dmareg, dmacsr & dev->dmareg, dma->cmdi,
+ dma->cmdu, dma->srcu, dma->dstu, dma->resu,
+ dma->cmdi, dma->srci, dma->dsti, dma->resi);
+
+ if ((dmacsr & dev->dmareg) == 0)
+ return IRQ_NONE;
+
+ hifn_write_1(dev, HIFN_1_DMA_CSR, dmacsr & dev->dmareg);
+
+ if (dmacsr & HIFN_DMACSR_ENGINE)
+ hifn_write_0(dev, HIFN_0_PUISR, hifn_read_0(dev, HIFN_0_PUISR));
+ if (dmacsr & HIFN_DMACSR_PUBDONE)
+ hifn_write_1(dev, HIFN_1_PUB_STATUS,
+ hifn_read_1(dev, HIFN_1_PUB_STATUS) | HIFN_PUBSTS_DONE);
+
+ restart = dmacsr & (HIFN_DMACSR_R_OVER | HIFN_DMACSR_D_OVER);
+ if (restart) {
+ u32 puisr = hifn_read_0(dev, HIFN_0_PUISR);
+
+ if (printk_ratelimit())
+ printk("%s: overflow: r: %d, d: %d, puisr: %08x, d: %u.\n",
+ dev->name, !!(dmacsr & HIFN_DMACSR_R_OVER),
+ !!(dmacsr & HIFN_DMACSR_D_OVER),
+ puisr, !!(puisr & HIFN_PUISR_DSTOVER));
+ if (!!(puisr & HIFN_PUISR_DSTOVER))
+ hifn_write_0(dev, HIFN_0_PUISR, HIFN_PUISR_DSTOVER);
+ hifn_write_1(dev, HIFN_1_DMA_CSR, dmacsr & (HIFN_DMACSR_R_OVER |
+ HIFN_DMACSR_D_OVER));
+ }
+
+ restart = dmacsr & (HIFN_DMACSR_C_ABORT | HIFN_DMACSR_S_ABORT |
+ HIFN_DMACSR_D_ABORT | HIFN_DMACSR_R_ABORT);
+ if (restart) {
+ if (printk_ratelimit())
+ printk("%s: abort: c: %d, s: %d, d: %d, r: %d.\n",
+ dev->name, !!(dmacsr & HIFN_DMACSR_C_ABORT),
+ !!(dmacsr & HIFN_DMACSR_S_ABORT),
+ !!(dmacsr & HIFN_DMACSR_D_ABORT),
+ !!(dmacsr & HIFN_DMACSR_R_ABORT));
+ hifn_reset_dma(dev, 1);
+ hifn_init_dma(dev);
+ hifn_init_registers(dev);
+ }
+
+ if ((dmacsr & HIFN_DMACSR_C_WAIT) && (dma->cmdu == 0)) {
+ dprintk("%s: wait on command.\n", dev->name);
+ dev->dmareg &= ~(HIFN_DMAIER_C_WAIT);
+ hifn_write_1(dev, HIFN_1_DMA_IER, dev->dmareg);
+ }
+
+ tasklet_schedule(&dev->tasklet);
+ hifn_clear_rings(dev);
+
+ return IRQ_HANDLED;
+}
+
+static void hifn_flush(struct hifn_device *dev)
+{
+ unsigned long flags;
+ struct crypto_async_request *async_req;
+ struct hifn_context *ctx;
+ struct ablkcipher_request *req;
+ struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
+ int i;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ for (i=0; i<HIFN_D_RES_RSIZE; ++i) {
+ struct hifn_desc *d = &dma->resr[i];
+
+ if (dev->sa[i]) {
+ hifn_process_ready(dev->sa[i],
+ (d->l & __cpu_to_le32(HIFN_D_VALID))?-ENODEV:0);
+ }
+ }
+
+ while ((async_req = crypto_dequeue_request(&dev->queue))) {
+ ctx = crypto_tfm_ctx(async_req->tfm);
+ req = container_of(async_req, struct ablkcipher_request, base);
+
+ hifn_process_ready(req, -ENODEV);
+ }
+ spin_unlock_irqrestore(&dev->lock, flags);
+}
+
+static int hifn_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
+ unsigned int len)
+{
+ struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
+ struct hifn_context *ctx = crypto_tfm_ctx(tfm);
+ struct hifn_device *dev = ctx->dev;
+
+ if (len > HIFN_MAX_CRYPT_KEY_LENGTH) {
+ crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
+ return -1;
+ }
+
+ if (len == HIFN_DES_KEY_LENGTH) {
+ u32 tmp[DES_EXPKEY_WORDS];
+ int ret = des_ekey(tmp, key);
+
+ if (unlikely(ret == 0) && (tfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
+ tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
+ return -EINVAL;
+ }
+ }
+
+ dev->flags &= ~HIFN_FLAG_OLD_KEY;
+
+ memcpy(ctx->key, key, len);
+ ctx->keysize = len;
+
+ return 0;
+}
+
+static int hifn_handle_req(struct ablkcipher_request *req)
+{
+ struct hifn_context *ctx = crypto_tfm_ctx(req->base.tfm);
+ struct hifn_device *dev = ctx->dev;
+ int err = -EAGAIN;
+
+ if (dev->started + DIV_ROUND_UP(req->nbytes, PAGE_SIZE) <= HIFN_QUEUE_LENGTH)
+ err = hifn_setup_session(req);
+
+ if (err == -EAGAIN) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ err = ablkcipher_enqueue_request(&dev->queue, req);
+ spin_unlock_irqrestore(&dev->lock, flags);
+ }
+
+ return err;
+}
+
+static int hifn_setup_crypto_req(struct ablkcipher_request *req, u8 op,
+ u8 type, u8 mode)
+{
+ struct hifn_context *ctx = crypto_tfm_ctx(req->base.tfm);
+ unsigned ivsize;
+
+ ivsize = crypto_ablkcipher_ivsize(crypto_ablkcipher_reqtfm(req));
+
+ if (req->info && mode != ACRYPTO_MODE_ECB) {
+ if (type == ACRYPTO_TYPE_AES_128)
+ ivsize = HIFN_AES_IV_LENGTH;
+ else if (type == ACRYPTO_TYPE_DES)
+ ivsize = HIFN_DES_KEY_LENGTH;
+ else if (type == ACRYPTO_TYPE_3DES)
+ ivsize = HIFN_3DES_KEY_LENGTH;
+ }
+
+ if (ctx->keysize != 16 && type == ACRYPTO_TYPE_AES_128) {
+ if (ctx->keysize == 24)
+ type = ACRYPTO_TYPE_AES_192;
+ else if (ctx->keysize == 32)
+ type = ACRYPTO_TYPE_AES_256;
+ }
+
+ ctx->op = op;
+ ctx->mode = mode;
+ ctx->type = type;
+ ctx->iv = req->info;
+ ctx->ivsize = ivsize;
+
+ /*
+ * HEAVY TODO: needs to kick Herbert XU to write documentation.
+ * HEAVY TODO: needs to kick Herbert XU to write documentation.
+ * HEAVY TODO: needs to kick Herbert XU to write documentation.
+ */
+
+ return hifn_handle_req(req);
+}
+
+static int hifn_process_queue(struct hifn_device *dev)
+{
+ struct crypto_async_request *async_req;
+ struct hifn_context *ctx;
+ struct ablkcipher_request *req;
+ unsigned long flags;
+ int err = 0;
+
+ while (dev->started < HIFN_QUEUE_LENGTH) {
+ spin_lock_irqsave(&dev->lock, flags);
+ async_req = crypto_dequeue_request(&dev->queue);
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ if (!async_req)
+ break;
+
+ ctx = crypto_tfm_ctx(async_req->tfm);
+ req = container_of(async_req, struct ablkcipher_request, base);
+
+ err = hifn_handle_req(req);
+ if (err)
+ break;
+ }
+
+ return err;
+}
+
+static int hifn_setup_crypto(struct ablkcipher_request *req, u8 op,
+ u8 type, u8 mode)
+{
+ int err;
+ struct hifn_context *ctx = crypto_tfm_ctx(req->base.tfm);
+ struct hifn_device *dev = ctx->dev;
+
+ err = hifn_setup_crypto_req(req, op, type, mode);
+ if (err)
+ return err;
+
+ if (dev->started < HIFN_QUEUE_LENGTH && dev->queue.qlen)
+ err = hifn_process_queue(dev);
+
+ return err;
+}
+
+/*
+ * AES ecryption functions.
+ */
+static inline int hifn_encrypt_aes_ecb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
+ ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_ECB);
+}
+static inline int hifn_encrypt_aes_cbc(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
+ ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_CBC);
+}
+static inline int hifn_encrypt_aes_cfb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
+ ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_CFB);
+}
+static inline int hifn_encrypt_aes_ofb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
+ ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_OFB);
+}
+
+/*
+ * AES decryption functions.
+ */
+static inline int hifn_decrypt_aes_ecb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
+ ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_ECB);
+}
+static inline int hifn_decrypt_aes_cbc(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
+ ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_CBC);
+}
+static inline int hifn_decrypt_aes_cfb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
+ ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_CFB);
+}
+static inline int hifn_decrypt_aes_ofb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
+ ACRYPTO_TYPE_AES_128, ACRYPTO_MODE_OFB);
+}
+
+/*
+ * DES ecryption functions.
+ */
+static inline int hifn_encrypt_des_ecb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
+ ACRYPTO_TYPE_DES, ACRYPTO_MODE_ECB);
+}
+static inline int hifn_encrypt_des_cbc(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
+ ACRYPTO_TYPE_DES, ACRYPTO_MODE_CBC);
+}
+static inline int hifn_encrypt_des_cfb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
+ ACRYPTO_TYPE_DES, ACRYPTO_MODE_CFB);
+}
+static inline int hifn_encrypt_des_ofb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
+ ACRYPTO_TYPE_DES, ACRYPTO_MODE_OFB);
+}
+
+/*
+ * DES decryption functions.
+ */
+static inline int hifn_decrypt_des_ecb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
+ ACRYPTO_TYPE_DES, ACRYPTO_MODE_ECB);
+}
+static inline int hifn_decrypt_des_cbc(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
+ ACRYPTO_TYPE_DES, ACRYPTO_MODE_CBC);
+}
+static inline int hifn_decrypt_des_cfb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
+ ACRYPTO_TYPE_DES, ACRYPTO_MODE_CFB);
+}
+static inline int hifn_decrypt_des_ofb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
+ ACRYPTO_TYPE_DES, ACRYPTO_MODE_OFB);
+}
+
+/*
+ * 3DES ecryption functions.
+ */
+static inline int hifn_encrypt_3des_ecb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
+ ACRYPTO_TYPE_3DES, ACRYPTO_MODE_ECB);
+}
+static inline int hifn_encrypt_3des_cbc(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
+ ACRYPTO_TYPE_3DES, ACRYPTO_MODE_CBC);
+}
+static inline int hifn_encrypt_3des_cfb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
+ ACRYPTO_TYPE_3DES, ACRYPTO_MODE_CFB);
+}
+static inline int hifn_encrypt_3des_ofb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_ENCRYPT,
+ ACRYPTO_TYPE_3DES, ACRYPTO_MODE_OFB);
+}
+
+/*
+ * 3DES decryption functions.
+ */
+static inline int hifn_decrypt_3des_ecb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
+ ACRYPTO_TYPE_3DES, ACRYPTO_MODE_ECB);
+}
+static inline int hifn_decrypt_3des_cbc(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
+ ACRYPTO_TYPE_3DES, ACRYPTO_MODE_CBC);
+}
+static inline int hifn_decrypt_3des_cfb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
+ ACRYPTO_TYPE_3DES, ACRYPTO_MODE_CFB);
+}
+static inline int hifn_decrypt_3des_ofb(struct ablkcipher_request *req)
+{
+ return hifn_setup_crypto(req, ACRYPTO_OP_DECRYPT,
+ ACRYPTO_TYPE_3DES, ACRYPTO_MODE_OFB);
+}
+
+struct hifn_alg_template
+{
+ char name[CRYPTO_MAX_ALG_NAME];
+ char drv_name[CRYPTO_MAX_ALG_NAME];
+ unsigned int bsize;
+ struct ablkcipher_alg ablkcipher;
+};
+
+static struct hifn_alg_template hifn_alg_templates[] = {
+ /*
+ * 3DES ECB, CBC, CFB and OFB modes.
+ */
+ {
+ .name = "cfb(des3_ede)", .drv_name = "hifn-3des", .bsize = 8,
+ .ablkcipher = {
+ .min_keysize = HIFN_3DES_KEY_LENGTH,
+ .max_keysize = HIFN_3DES_KEY_LENGTH,
+ .setkey = hifn_setkey,
+ .encrypt = hifn_encrypt_3des_cfb,
+ .decrypt = hifn_decrypt_3des_cfb,
+ },
+ },
+ {
+ .name = "ofb(des3_ede)", .drv_name = "hifn-3des", .bsize = 8,
+ .ablkcipher = {
+ .min_keysize = HIFN_3DES_KEY_LENGTH,
+ .max_keysize = HIFN_3DES_KEY_LENGTH,
+ .setkey = hifn_setkey,
+ .encrypt = hifn_encrypt_3des_ofb,
+ .decrypt = hifn_decrypt_3des_ofb,
+ },
+ },
+ {
+ .name = "cbc(des3_ede)", .drv_name = "hifn-3des", .bsize = 8,
+ .ablkcipher = {
+ .min_keysize = HIFN_3DES_KEY_LENGTH,
+ .max_keysize = HIFN_3DES_KEY_LENGTH,
+ .setkey = hifn_setkey,
+ .encrypt = hifn_encrypt_3des_cbc,
+ .decrypt = hifn_decrypt_3des_cbc,
+ },
+ },
+ {
+ .name = "ecb(des3_ede)", .drv_name = "hifn-3des", .bsize = 8,
+ .ablkcipher = {
+ .min_keysize = HIFN_3DES_KEY_LENGTH,
+ .max_keysize = HIFN_3DES_KEY_LENGTH,
+ .setkey = hifn_setkey,
+ .encrypt = hifn_encrypt_3des_ecb,
+ .decrypt = hifn_decrypt_3des_ecb,
+ },
+ },
+
+ /*
+ * DES ECB, CBC, CFB and OFB modes.
+ */
+ {
+ .name = "cfb(des)", .drv_name = "hifn-des", .bsize = 8,
+ .ablkcipher = {
+ .min_keysize = HIFN_DES_KEY_LENGTH,
+ .max_keysize = HIFN_DES_KEY_LENGTH,
+ .setkey = hifn_setkey,
+ .encrypt = hifn_encrypt_des_cfb,
+ .decrypt = hifn_decrypt_des_cfb,
+ },
+ },
+ {
+ .name = "ofb(des)", .drv_name = "hifn-des", .bsize = 8,
+ .ablkcipher = {
+ .min_keysize = HIFN_DES_KEY_LENGTH,
+ .max_keysize = HIFN_DES_KEY_LENGTH,
+ .setkey = hifn_setkey,
+ .encrypt = hifn_encrypt_des_ofb,
+ .decrypt = hifn_decrypt_des_ofb,
+ },
+ },
+ {
+ .name = "cbc(des)", .drv_name = "hifn-des", .bsize = 8,
+ .ablkcipher = {
+ .min_keysize = HIFN_DES_KEY_LENGTH,
+ .max_keysize = HIFN_DES_KEY_LENGTH,
+ .setkey = hifn_setkey,
+ .encrypt = hifn_encrypt_des_cbc,
+ .decrypt = hifn_decrypt_des_cbc,
+ },
+ },
+ {
+ .name = "ecb(des)", .drv_name = "hifn-des", .bsize = 8,
+ .ablkcipher = {
+ .min_keysize = HIFN_DES_KEY_LENGTH,
+ .max_keysize = HIFN_DES_KEY_LENGTH,
+ .setkey = hifn_setkey,
+ .encrypt = hifn_encrypt_des_ecb,
+ .decrypt = hifn_decrypt_des_ecb,
+ },
+ },
+
+ /*
+ * AES ECB, CBC, CFB and OFB modes.
+ */
+ {
+ .name = "ecb(aes)", .drv_name = "hifn-aes", .bsize = 16,
+ .ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = hifn_setkey,
+ .encrypt = hifn_encrypt_aes_ecb,
+ .decrypt = hifn_decrypt_aes_ecb,
+ },
+ },
+ {
+ .name = "cbc(aes)", .drv_name = "hifn-aes", .bsize = 16,
+ .ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = hifn_setkey,
+ .encrypt = hifn_encrypt_aes_cbc,
+ .decrypt = hifn_decrypt_aes_cbc,
+ },
+ },
+ {
+ .name = "cfb(aes)", .drv_name = "hifn-aes", .bsize = 16,
+ .ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = hifn_setkey,
+ .encrypt = hifn_encrypt_aes_cfb,
+ .decrypt = hifn_decrypt_aes_cfb,
+ },
+ },
+ {
+ .name = "ofb(aes)", .drv_name = "hifn-aes", .bsize = 16,
+ .ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = hifn_setkey,
+ .encrypt = hifn_encrypt_aes_ofb,
+ .decrypt = hifn_decrypt_aes_ofb,
+ },
+ },
+};
+
+static int hifn_cra_init(struct crypto_tfm *tfm)
+{
+ struct crypto_alg *alg = tfm->__crt_alg;
+ struct hifn_crypto_alg *ha = crypto_alg_to_hifn(alg);
+ struct hifn_context *ctx = crypto_tfm_ctx(tfm);
+
+ ctx->dev = ha->dev;
+
+ return 0;
+}
+
+static int hifn_alg_alloc(struct hifn_device *dev, struct hifn_alg_template *t)
+{
+ struct hifn_crypto_alg *alg;
+ int err;
+
+ alg = kzalloc(sizeof(struct hifn_crypto_alg), GFP_KERNEL);
+ if (!alg)
+ return -ENOMEM;
+
+ snprintf(alg->alg.cra_name, CRYPTO_MAX_ALG_NAME, "%s", t->name);
+ snprintf(alg->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s", t->drv_name);
+
+ alg->alg.cra_priority = 300;
+ alg->alg.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;
+ alg->alg.cra_blocksize = t->bsize;
+ alg->alg.cra_ctxsize = sizeof(struct hifn_context);
+ alg->alg.cra_alignmask = 15;
+ if (t->bsize == 8)
+ alg->alg.cra_alignmask = 3;
+ alg->alg.cra_type = &crypto_ablkcipher_type;
+ alg->alg.cra_module = THIS_MODULE;
+ alg->alg.cra_u.ablkcipher = t->ablkcipher;
+ alg->alg.cra_init = hifn_cra_init;
+
+ alg->dev = dev;
+
+ list_add_tail(&alg->entry, &dev->alg_list);
+
+ err = crypto_register_alg(&alg->alg);
+ if (err) {
+ list_del(&alg->entry);
+ kfree(alg);
+ }
+
+ return err;
+}
+
+static void hifn_unregister_alg(struct hifn_device *dev)
+{
+ struct hifn_crypto_alg *a, *n;
+
+ list_for_each_entry_safe(a, n, &dev->alg_list, entry) {
+ list_del(&a->entry);
+ crypto_unregister_alg(&a->alg);
+ kfree(a);
+ }
+}
+
+static int hifn_register_alg(struct hifn_device *dev)
+{
+ int i, err;
+
+ for (i=0; i<ARRAY_SIZE(hifn_alg_templates); ++i) {
+ err = hifn_alg_alloc(dev, &hifn_alg_templates[i]);
+ if (err)
+ goto err_out_exit;
+ }
+
+ return 0;
+
+err_out_exit:
+ hifn_unregister_alg(dev);
+ return err;
+}
+
+static void hifn_tasklet_callback(unsigned long data)
+{
+ struct hifn_device *dev = (struct hifn_device *)data;
+
+ /*
+ * This is ok to call this without lock being held,
+ * althogh it modifies some parameters used in parallel,
+ * (like dev->success), but they are used in process
+ * context or update is atomic (like setting dev->sa[i] to NULL).
+ */
+ hifn_check_for_completion(dev, 0);
+}
+
+static int hifn_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ int err, i;
+ struct hifn_device *dev;
+ char name[8];
+
+ err = pci_enable_device(pdev);
+ if (err)
+ return err;
+ pci_set_master(pdev);
+
+ err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
+ if (err)
+ goto err_out_disable_pci_device;
+
+ snprintf(name, sizeof(name), "hifn%d",
+ atomic_inc_return(&hifn_dev_number)-1);
+
+ err = pci_request_regions(pdev, name);
+ if (err)
+ goto err_out_disable_pci_device;
+
+ if (pci_resource_len(pdev, 0) < HIFN_BAR0_SIZE ||
+ pci_resource_len(pdev, 1) < HIFN_BAR1_SIZE ||
+ pci_resource_len(pdev, 2) < HIFN_BAR2_SIZE) {
+ dprintk("%s: Broken hardware - I/O regions are too small.\n",
+ pci_name(pdev));
+ err = -ENODEV;
+ goto err_out_free_regions;
+ }
+
+ dev = kzalloc(sizeof(struct hifn_device) + sizeof(struct crypto_alg),
+ GFP_KERNEL);
+ if (!dev) {
+ err = -ENOMEM;
+ goto err_out_free_regions;
+ }
+
+ INIT_LIST_HEAD(&dev->alg_list);
+
+ snprintf(dev->name, sizeof(dev->name), "%s", name);
+ spin_lock_init(&dev->lock);
+
+ for (i=0; i<3; ++i) {
+ unsigned long addr, size;
+
+ addr = pci_resource_start(pdev, i);
+ size = pci_resource_len(pdev, i);
+
+ dev->bar[i] = ioremap_nocache(addr, size);
+ if (!dev->bar[i])
+ goto err_out_unmap_bars;
+ }
+
+ dev->result_mem = __get_free_pages(GFP_KERNEL, HIFN_MAX_RESULT_ORDER);
+ if (!dev->result_mem) {
+ dprintk("Failed to allocate %d pages for result_mem.\n",
+ HIFN_MAX_RESULT_ORDER);
+ goto err_out_unmap_bars;
+ }
+ memset((void *)dev->result_mem, 0, PAGE_SIZE*(1<<HIFN_MAX_RESULT_ORDER));
+
+ dev->dst = pci_map_single(pdev, (void *)dev->result_mem,
+ PAGE_SIZE << HIFN_MAX_RESULT_ORDER, PCI_DMA_FROMDEVICE);
+
+ dev->desc_virt = pci_alloc_consistent(pdev, sizeof(struct hifn_dma),
+ &dev->desc_dma);
+ if (!dev->desc_virt) {
+ dprintk("Failed to allocate descriptor rings.\n");
+ goto err_out_free_result_pages;
+ }
+ memset(dev->desc_virt, 0, sizeof(struct hifn_dma));
+
+ dev->pdev = pdev;
+ dev->irq = pdev->irq;
+
+ for (i=0; i<HIFN_D_RES_RSIZE; ++i)
+ dev->sa[i] = NULL;
+
+ pci_set_drvdata(pdev, dev);
+
+ tasklet_init(&dev->tasklet, hifn_tasklet_callback, (unsigned long)dev);
+
+ crypto_init_queue(&dev->queue, 1);
+
+ err = request_irq(dev->irq, hifn_interrupt, IRQF_SHARED, dev->name, dev);
+ if (err) {
+ dprintk("Failed to request IRQ%d: err: %d.\n", dev->irq, err);
+ dev->irq = 0;
+ goto err_out_free_desc;
+ }
+
+ err = hifn_start_device(dev);
+ if (err)
+ goto err_out_free_irq;
+
+ err = hifn_test(dev, 1, 0);
+ if (err)
+ goto err_out_stop_device;
+
+ err = hifn_register_rng(dev);
+ if (err)
+ goto err_out_stop_device;
+
+ err = hifn_register_alg(dev);
+ if (err)
+ goto err_out_unregister_rng;
+
+ INIT_DELAYED_WORK(&dev->work, hifn_work);
+ schedule_delayed_work(&dev->work, HZ);
+
+ dprintk("HIFN crypto accelerator card at %s has been "
+ "successfully registered as %s.\n",
+ pci_name(pdev), dev->name);
+
+ return 0;
+
+err_out_unregister_rng:
+ hifn_unregister_rng(dev);
+err_out_stop_device:
+ hifn_reset_dma(dev, 1);
+ hifn_stop_device(dev);
+err_out_free_irq:
+ free_irq(dev->irq, dev->name);
+ tasklet_kill(&dev->tasklet);
+err_out_free_desc:
+ pci_free_consistent(pdev, sizeof(struct hifn_dma),
+ dev->desc_virt, dev->desc_dma);
+
+err_out_free_result_pages:
+ pci_unmap_single(pdev, dev->dst, PAGE_SIZE << HIFN_MAX_RESULT_ORDER,
+ PCI_DMA_FROMDEVICE);
+ free_pages(dev->result_mem, HIFN_MAX_RESULT_ORDER);
+
+err_out_unmap_bars:
+ for (i=0; i<3; ++i)
+ if (dev->bar[i])
+ iounmap(dev->bar[i]);
+
+err_out_free_regions:
+ pci_release_regions(pdev);
+
+err_out_disable_pci_device:
+ pci_disable_device(pdev);
+
+ return err;
+}
+
+static void hifn_remove(struct pci_dev *pdev)
+{
+ int i;
+ struct hifn_device *dev;
+
+ dev = pci_get_drvdata(pdev);
+
+ if (dev) {
+ cancel_delayed_work(&dev->work);
+ flush_scheduled_work();
+
+ hifn_unregister_rng(dev);
+ hifn_unregister_alg(dev);
+ hifn_reset_dma(dev, 1);
+ hifn_stop_device(dev);
+
+ free_irq(dev->irq, dev->name);
+ tasklet_kill(&dev->tasklet);
+
+ hifn_flush(dev);
+
+ pci_free_consistent(pdev, sizeof(struct hifn_dma),
+ dev->desc_virt, dev->desc_dma);
+ pci_unmap_single(pdev, dev->dst,
+ PAGE_SIZE << HIFN_MAX_RESULT_ORDER,
+ PCI_DMA_FROMDEVICE);
+ free_pages(dev->result_mem, HIFN_MAX_RESULT_ORDER);
+ for (i=0; i<3; ++i)
+ if (dev->bar[i])
+ iounmap(dev->bar[i]);
+
+ kfree(dev);
+ }
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+static struct pci_device_id hifn_pci_tbl[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_HIFN, PCI_DEVICE_ID_HIFN_7955) },
+ { PCI_DEVICE(PCI_VENDOR_ID_HIFN, PCI_DEVICE_ID_HIFN_7956) },
+ { 0 }
+};
+MODULE_DEVICE_TABLE(pci, hifn_pci_tbl);
+
+static struct pci_driver hifn_pci_driver = {
+ .name = "hifn795x",
+ .id_table = hifn_pci_tbl,
+ .probe = hifn_probe,
+ .remove = __devexit_p(hifn_remove),
+};
+
+static int __devinit hifn_init(void)
+{
+ unsigned int freq;
+ int err;
+
+ if (strncmp(hifn_pll_ref, "ext", 3) &&
+ strncmp(hifn_pll_ref, "pci", 3)) {
+ printk(KERN_ERR "hifn795x: invalid hifn_pll_ref clock, "
+ "must be pci or ext");
+ return -EINVAL;
+ }
+
+ /*
+ * For the 7955/7956 the reference clock frequency must be in the
+ * range of 20MHz-100MHz. For the 7954 the upper bound is 66.67MHz,
+ * but this chip is currently not supported.
+ */
+ if (hifn_pll_ref[3] != '\0') {
+ freq = simple_strtoul(hifn_pll_ref + 3, NULL, 10);
+ if (freq < 20 || freq > 100) {
+ printk(KERN_ERR "hifn795x: invalid hifn_pll_ref "
+ "frequency, must be in the range "
+ "of 20-100");
+ return -EINVAL;
+ }
+ }
+
+ err = pci_register_driver(&hifn_pci_driver);
+ if (err < 0) {
+ dprintk("Failed to register PCI driver for %s device.\n",
+ hifn_pci_driver.name);
+ return -ENODEV;
+ }
+
+ printk(KERN_INFO "Driver for HIFN 795x crypto accelerator chip "
+ "has been successfully registered.\n");
+
+ return 0;
+}
+
+static void __devexit hifn_fini(void)
+{
+ pci_unregister_driver(&hifn_pci_driver);
+
+ printk(KERN_INFO "Driver for HIFN 795x crypto accelerator chip "
+ "has been successfully unregistered.\n");
+}
+
+module_init(hifn_init);
+module_exit(hifn_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
+MODULE_DESCRIPTION("Driver for HIFN 795x crypto accelerator chip.");
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